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Book ; Online: Verringerungen von Kunststoffmüll aus der Krabbenfischerei durch Netzmodifikationen - Dolly Rope Suspension (DRopS)

Stepputtis, Daniel / Noack, Thomas / Lichtenstein, Uwe / Hammerl, Constanze / Santos, Juan / Mieske, Bernd

Projekt-Abschlußbericht

2022

Abstract: ... von Polyethylenseilen angebracht. Diese Tauwerks-Kardeele sind als „Dolly Ropes“ bekannt. Ein großer Teil des Dolly Rope ... die den Kontakt des Netzes mit dem Meeresboden verringern bzw. verhindern und somit die Nutzung von Dolly Ropes ... seabed, mats of polyethylene rope cardels are often placed there. These ropes are known as “dolly ... ...

Abstract	Baumkurrennetze werden bauartbedingt sehr nahe am Meeresboden geschleppt. Um das Durchscheuern der Unterblätter dieser Netze am Meeresboden zu verringern, werden dort häufig Matten aus Kardeelen von Polyethylenseilen angebracht. Diese Tauwerks-Kardeele sind als „Dolly Ropes“ bekannt. Ein großer Teil des Dolly Rope-Materials wird nach kürzester Zeit auf See freigesetzt. Daraus ergeben sich folgende Probleme: • ökologisches Problem, u.a. durch Eintrag von Kunststoff in das Ökosystem und in die Nahrungskette • ästhetisches Problem, z.B. für den Tourismus an der Nordsee • Problem für die Fischerei und Schifffahrt, z.B. durch Einschneiden der Fasern in Motorwellen und Fischereigerät • mögliches rechtliches Problem durch Verstoß gegen das MARPOL Übereinkommen 1, dass jegliches Einbringen von Kunststoff ins Meer verbietet • mögliche/wahrscheinliche Verschlechterung der Größenselektion der Schleppnetze durch Verschließen der Maschen und dadurch eine Erhöhung der unerwünschten Beifänge Ziel des Projektes „DRopS“ war es, Netzmodifikationen zu entwickeln und zu testen, die den Kontakt des Netzes mit dem Meeresboden verringern bzw. verhindern und somit die Nutzung von Dolly Ropes als Scheuerschutz überflüssig machen. Im Rahmen des Projektes lag der Schwerpunkt zunächst auf der Nordseegarnelenfischerei, wobei die gefundenen Lösungen möglichst auch auf andere Fischereien übertragbar sein sollten. Aus einer Analyse der möglichen verschiedenen Ursachen für das Scheuern des Netzes am Meeresgrund (Abbildung 1; links) ergeben sich mehrere Lösungsansätze (Abbildung 1; rechts). Basierend auf diesen Ansätzen, wurden verschiedene Fanggerätmodifikationen diskutiert, ggf. (weiter-)entwickelt und getestet (Tabelle 1). Diese Fanggerätemodifikationen und die Ergebnisse werden ausführlich in Kapitel 3 beschrieben. . Beam trawls are towed very close to the seabed due to their design. To reduce chafing of the lower panels of these nets on the seabed, mats of polyethylene rope cardels are often placed there. These ropes are known as “dolly ...
Keywords	Text ; ddc:333.7 ; Fischerei -- Nordsee -- Baumkurre -- Fanggerätemodifikation -- Meeresmüll -- Dolly Ropes -- fishery -- North Sea -- beamtrawl -- fishing gear modification -- marine litter
Subject code	801
Language	German
Publisher	Johann Heinrich von Thünen-Institut
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Verringerungen von Kunststoffmüll aus der Krabbenfischerei durch Netzmodifikationen - Dolly Rope Suspension (DRopS)

Stepputtis, Daniel / Noack, Thomas / Lichtenstein, Uwe / Hammerl, Constanze / Santos, Juan / Mieske, Bernd

Projekt-Abschlußbericht

2022

Abstract: ... von Polyethylenseilen angebracht. Diese Tauwerks-Kardeele sind als 'Dolly Ropes' bekannt. Ein großer Teil des Dolly Rope ... verhindern und somit die Nutzung von Dolly Ropes als Scheuerschutz überflüssig machen. Im Rahmen ...

Abstract	Baumkurrennetze werden bauartbedingt sehr nahe am Meeresboden geschleppt. Um das Durchscheuern der Unterblätter dieser Netze am Meeresboden zu verringern, werden dort häufig Matten aus Kardeelen von Polyethylenseilen angebracht. Diese Tauwerks-Kardeele sind als 'Dolly Ropes' bekannt. Ein großer Teil des Dolly Rope-Materials wird nach kürzester Zeit auf See freigesetzt. Daraus ergeben sich folgende Probleme: • ökologisches Problem, u.a. durch Eintrag von Kunststoff in das Ökosystem und in die Nahrungskette • ästhetisches Problem, z.B. für den Tourismus an der Nordsee • Problem für die Fischerei und Schifffahrt, z.B. durch Einschneiden der Fasern in Motorwellen und Fischereigerät • mögliches rechtliches Problem durch Verstoß gegen das MARPOL Übereinkommen 1, dass jegliches Einbringen von Kunststoff ins Meer verbietet • mögliche/wahrscheinliche Verschlechterung der Größenselektion der Schleppnetze durch Verschließen der Maschen und dadurch eine Erhöhung der unerwünschten Beifänge Ziel des Projektes 'DRopS' war es, Netzmodifikationen zu entwickeln und zu testen, die den Kontakt des Netzes mit dem Meeresboden verringern bzw. verhindern und somit die Nutzung von Dolly Ropes als Scheuerschutz überflüssig machen. Im Rahmen des Projektes lag der Schwerpunkt zunächst auf der Nordseegarnelenfischerei, wobei die gefundenen Lösungen möglichst auch auf andere Fischereien übertragbar sein sollten. Aus einer Analyse der möglichen verschiedenen Ursachen für das Scheuern des Netzes am Meeresgrund (Abbildung 1; links) ergeben sich mehrere Lösungsansätze (Abbildung 1; rechts). Basierend auf diesen Ansätzen, wurden verschiedene Fanggerätmodifikationen diskutiert, ggf. (weiter-)entwickelt und getestet (Tabelle 1). Diese Fanggerätemodifikationen und die Ergebnisse werden ausführlich in Kapitel 3 beschrieben. [.] Beam trawls are towed very close to the seabed due to their design. To reduce chafing of the lower panels of these nets on the seabed, mats of polyethylene rope cardels ...
Keywords	ddc:630 ; Fischerei ; Nordsee ; Baumkurre ; Fanggerätemodifikation ; Meeresmüll ; Dolly Ropes ; fishery ; North Sea ; beamtrawl ; fishing gear modification ; marine litter
Subject code	801
Language	German
Publisher	Braunschweig: Johann Heinrich von Thünen-Institut
Publishing country	de
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Low levels of hybridization between sympatric Arctic char (Salvelinus alpinus) and Dolly Varden char (Salvelinus malma) highlights their genetic distinctiveness and ecological segregation.

May-McNally, Shannan L / Quinn, Thomas P / Taylor, Eric B

Ecology and evolution

2015 Volume 5, Issue 15, Page(s) 3031–3045

Abstract: ... stages. Arctic char (Salvelinus alpinus) and Dolly Varden (S. malma) are recently diverged salmonid ... than reported in a previous study (<0.6% to 5% of samples classified as late-generation hybrids). Dolly ... status of Dolly Varden and Arctic char and suggest that ecological segregation may be an important factor ...

Abstract	Understanding the extent of interspecific hybridization and how ecological segregation may influence hybridization requires comprehensively sampling different habitats over a range of life history stages. Arctic char (Salvelinus alpinus) and Dolly Varden (S. malma) are recently diverged salmonid fishes that come into contact in several areas of the North Pacific where they occasionally hybridize. To better quantify the degree of hybridization and ecological segregation between these taxa, we sampled over 700 fish from multiple lake (littoral and profundal) and stream sites in two large, interconnected southwestern Alaskan lakes. Individuals were genotyped at 12 microsatellite markers, and genetic admixture (Q) values generated through Bayesian-based clustering revealed hybridization levels generally lower than reported in a previous study (<0.6% to 5% of samples classified as late-generation hybrids). Dolly Varden and Arctic char tended to make different use of stream habitats with the latter apparently abandoning streams for lake habitats after 2-3 years of age. Our results support the distinct biological species status of Dolly Varden and Arctic char and suggest that ecological segregation may be an important factor limiting opportunities for hybridization and/or the ecological performance of hybrid char.
Language	English
Publishing date	2015-07-07
Publishing country	England
Document type	Journal Article
ISSN	2045-7758
ISSN	2045-7758
DOI	10.1002/ece3.1583
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Ontogenetic shift to dependence on salmon-derived nutrients in Dolly Varden char from the Iliamna River, Alaska

Jaecks, Troy / Quinn, Thomas P

Environmental biology of fishes. 2014 Dec., v. 97, no. 12

2014

Abstract: ... of marine subsidy use by resident Dolly Varden, Salvelinus malma, were tested using diet and stable ...

Abstract	The upstream migration, spawning, and death of anadromous, semelparous Pacific salmon brings nutrients to terrestrial and aquatic communities around the Pacific Rim. Many fishes use these resources but the relationship between fish body size and the reliance on salmon-derived nutrients might follow one of several patterns related to the onset of egg consumption with body size as fish grow, and possible shifts to alternative prey such as fishes as they grow larger still. In this study, these size-dependent hypotheses of marine subsidy use by resident Dolly Varden, Salvelinus malma, were tested using diet and stable isotope analyses. S. malma did not shift abruptly to a reliance on salmon eggs after they became large enough to eat eggs (i.e., no gape limitation). Rather, fish large enough to eat eggs but < 150 mm showed diets that blended salmon nutrients with aquatic insects, likely because they were spatially segregated from the highest concentration of spawning sockeye salmon, Oncorhynchus nerka. From intermediate through the largest sizes observed (150 to > 600 mm long) S. malma received ca. 80 % of their nutrients from salmon (eggs, flesh, and maggots that had scavenged dead salmon) based on diet analysis and stable isotope ratios despite being large enough to consume fish, as many similarly-sized salmonids do in other ecosystems. The few fish sampled in June, prior to the availability of salmon subsidies, had stable isotope signatures that also reflected heavy (ca. 90 %) reliance on marine sources, likely because they had eaten little since the end of the salmon run the previous fall. This apparent avoidance of piscivory in favor a rich yet pulsed marine subsidy highlights the importance of healthy salmon runs for the sake of not only the salmon but resident fishes that consume them.
Keywords	Oncorhynchus nerka ; Salvelinus ; aquatic communities ; aquatic insects ; body size ; death ; diet ; ecosystems ; eggs ; insect larvae ; nutrients ; rivers ; salmon ; spawning ; stable isotopes ; subsidies ; Alaska ; Pacific Rim
Language	English
Dates of publication	2014-12
Size	p. 1323-1333.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	196790-3
ISSN	1573-5133 ; 0378-1909
ISSN (online)	1573-5133
ISSN	0378-1909
DOI	10.1007/s10641-014-0221-3
Database	NAL-Catalogue (AGRICOLA)

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Article: Use of otolith microchemistry and stable isotopes to investigate the ecology and anadromous migrations of Northern Dolly Varden from the Egegik River, Bristol Bay, Alaska

Hart, Lindsay M / Bond, Morgan H / May-McNally, Shannan L / Miller, Jessica A / Quinn, Thomas P

Environmental biology of fishes. 2015 June, v. 98, no. 6

2015

Abstract: Dolly Varden (Salvelinus malma) is a facultatively anadromous and iteroparous salmonid species ... 2013, were identified using molecular genetic techniques as Dolly Varden. Otoliths indicated ... by Dolly Varden across a wide range of sizes and ages during regular but brief migrations, and provide new ...

Abstract	Dolly Varden (Salvelinus malma) is a facultatively anadromous and iteroparous salmonid species, widely distributed around the Pacific Rim. Its distribution overlaps in northern areas with the circumpolar congeneric Arctic char (S. alpinus), which shares some of its life history traits. Despite the abundance of both species in many Alaskan watersheds and the diversity of their life histories, relatively little is known about their estuarine and marine ecology and migrations. Thirty char, taken as by-catch in the sockeye salmon (Oncorhynchus nerka) gill net fishery in the Egegik District, Bristol Bay, Alaska in June and July 2013, were identified using molecular genetic techniques as Dolly Varden. Otoliths indicated that the fish, ranging from 445 to 560 mm fork length, were from 4 to 9 years old, with a modal age of 6 (40 % of the specimens). Microchemical analysis indicated that all fish had first migrated to sea at ages 2 or 3 (16 and 14 individuals, respectively), migrated annually thereafter to a maximum of eight times, and did not over-winter in marine waters. Moreover, the fish were produced by a mix of anadromous mothers (14 fish) and non-anadromous mothers (11 fish); the maternal origin of the other five fish was uncertain. Despite the fact that the fish were captured in the riverine/estuarine environment of the Egegik River, stable isotope analysis of muscle tissue samples indicated that they had relied on marine prey, and this was supported by the high Sr levels in the otoliths, indicating prior occupancy of marine rather than fresh water for all individuals tested. Together, these analyses reveal extensive use of marine resources by Dolly Varden across a wide range of sizes and ages during regular but brief migrations, and provide new information on this facultatively anadromous, long-lived salmonid.
Keywords	Oncorhynchus nerka ; Salvelinus alpinus ; bycatch ; ecology ; fish ; freshwater ; genetic techniques and protocols ; gillnets ; life history ; marine resources ; marine science ; mothers ; muscle tissues ; otoliths ; rivers ; stable isotopes ; strontium ; watersheds ; Alaska ; Pacific Rim
Language	English
Dates of publication	2015-06
Size	p. 1633-1643.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	196790-3
ISSN	1573-5133 ; 0378-1909
ISSN (online)	1573-5133
ISSN	0378-1909
DOI	10.1007/s10641-015-0389-1
Database	NAL-Catalogue (AGRICOLA)

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Article: Ian Wilmut. Schoepfer der Generation Dolly

Willke, Thomas

Bild der Wissenschaft

2001 , Issue 4, Page(s) 30–33

Title translation	Ian Wilmut. Creator of the generation Dolly
Keywords	cloning ; transgenic animals ; biology ; therapeutic research ; dolly (1997)
Subject code	GA; PO
Language	German
Document type	Article
ZDB-ID	1104-6
ISSN	0006-2375
ISSN	0006-2375
Database	Ethics in Medicine (ETHMED)

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Article: Patterns and influences on Dolly Varden migratory timing in the Chignik Lakes, Alaska, and comparison of populations throughout the northeastern Pacific and Arctic oceans

Bond, Morgan H / Thomas P. Quinn

Canadian journal of fisheries and aquatic sciences. 2013 Feb. 4, v. 70, no. 5

2013

Abstract: Dolly Varden (Salvelinus malma) are a facultatively anadromous salmonid common around much ... of their migration. We combined telemetry of anadromous fish with long-term monitoring of Dolly Varden upstream ... of Dolly Varden, median upstream migration date increased with latitude. Overall, Dolly Varden migration timing is ...

Abstract	Dolly Varden (Salvelinus malma) are a facultatively anadromous salmonid common around much of the North Pacific Rim, but little is known about the environmental factors affecting the timing and diversity of their migration. We combined telemetry of anadromous fish with long-term monitoring of Dolly Varden upstream migration timing and environmental data in the Chignik Lakes watershed in Alaska and then compared the timing data with that of other streams where only count data were available. Telemetry revealed two upstream migration modes: midsummer and late fall at the Chignik Lakes. Weir counts indicated that timing fluctuated markedly over the monitoring period (1996â2011) and was negatively correlated with June sea surface temperature. The relationship between sea surface temperature and migration timing in other watersheds with long-term records was as follows: negative (Buskin River), positive (Auke Creek), or nonexistent (Goodnews and Kanektok rivers). Among 18 streams and rivers throughout the eastern Pacific range of Dolly Varden, median upstream migration date increased with latitude. Overall, Dolly Varden migration timing is more variable, protracted, and more strongly influenced by local sea surface temperatures than is typical of semelparous salmonids. These results are likely indicative of other iteroparous salmonids in Pacific waters that share similar environments and life-history characteristics.
Keywords	anadromous fish ; autumn ; environmental factors ; lakes ; latitude ; life history ; migratory behavior ; monitoring ; rivers ; Salvelinus malma ; streams ; summer ; surface water temperature ; telemetry ; watersheds ; Alaska ; Pacific Rim
Language	English
Dates of publication	2013-0204
Size	p. 655-665.
Publishing place	NRC Research Press
Document type	Article
ZDB-ID	1473089-3
ISSN	1205-7533 ; 0706-652X
ISSN (online)	1205-7533
ISSN	0706-652X
DOI	10.1139/cjfas-2012-0416
Database	NAL-Catalogue (AGRICOLA)

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Article: TI: Ian Wilmut. Schoepfer der Generation Dolly

AU: Willke, Thomas / EDR:

JT: Bild der Wissenschaft

(SE:)

PY: 2001 Volume VOLUME / ISSUE:, Issue 4, Page(s) PAGINATION: 30–33

Abstract: AB: ...

Title translation	TITLE TRANSLATION: (Ian Wilmut. Creator of the generation Dolly)
Institution	CS:
Series title	SE:
Abstract	AB:
Keywords	it: cloning ; transgenic animals ; biology ; therapeutic research ; keyword identifiers: dolly (1997)
Subject code	SC: GA; PO
Language	Latin ; German
Publisher	PU:
Document type	Article
Note	NOTE:
ISSN	ISSN: 0006-2375
Database	Ethics in Medicine (ETHMED)

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Article: Chemosensory responses of juvenile Coho salmon, Oncorhynchus kisutch, Dolly Varden, Salvelinus malma, and sculpins (Cottus spp.) to eggs and other tissues from adult Pacific salmon

Quinn, Thomas P / Dittman, Andrew H / Barrett, Hannah / Cunningham, Curry / Bond, Morgan H

Environmental biology of fishes. 2012 Nov., v. 95, no. 3

2012

Abstract: ... and sufficient to attract juvenile Dolly Varden (Salvelinus malma), coho salmon (Oncorhynchus kisutch ...

Abstract	The carcasses of semelparous Pacific salmon (Oncorhynchus spp.) provide nutrients that enter aquatic ecosystems by various pathways, including direct consumption of tissue by fishes. Salmonids and other species frequently eat eggs and other tissues from dead salmon but the roles of vision and olfaction are unclear, as is the relative attraction to different tissues. Accordingly, we conducted a series of in situ experiments using minnow traps in two natural streams in Alaska to test the relative roles of chemosensory and visual cues in attraction of fishes to eggs from adult Pacific salmon, and then compared catch rates of traps baited with eggs, muscle, liver, and testis. Experiments indicated that chemical traces were necessary and sufficient to attract juvenile Dolly Varden (Salvelinus malma), coho salmon (Oncorhynchus kisutch), and sculpins (Cottus spp.) into traps. Combining both sites, 70 salmonids and 19 sculpins were trapped using visual and chemical cues, and 53 and 21, respectively, for traps with only chemical cues. Traps with only the sight of eggs caught no salmonids and only 5 sculpins, comparable to empty control traps. In addition, eggs were markedly more attractive than the other tissues, trapping 68 % of the salmonids and 69 % of the sculpins, compared to 14 % and 15 % for muscle tissue, 12 % and 11 % for liver, and 6 % and 5 % for the testis. Visual cues undoubtedly play a role in egg consumption in streams, but these experiments indicated a very important role of chemical traces in attracting fish to the vicinity of the eggs, and selective attraction of eggs over other salmon tissues.
Keywords	Cottus ; Oncorhynchus kisutch ; Salvelinus ; bait traps ; ecosystems ; eggs ; fish eggs ; liver ; meat carcasses ; minnows ; muscle tissues ; muscles ; nutrients ; salmon ; smell ; streams ; testes ; trapping ; vision ; Alaska
Language	English
Dates of publication	2012-11
Size	p. 301-307.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	196790-3
ISSN	1573-5133 ; 0378-1909
ISSN (online)	1573-5133
ISSN	0378-1909
DOI	10.1007/s10641-012-9996-2
Database	NAL-Catalogue (AGRICOLA)

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Book: The memoirs of Dolly Morton

Rebell, Hugues / Thomas, Donald

from the rare Carrington edition of 1899

1970

Author's details	[authorship ... generally attributed to Hugues Rebell]. With an Introd. by Donald Thomas
Language	English
Size	181 S.
Publisher	Odyssey Press
Publishing place	London
Document type	Book
Database	Former special subject collection: coastal and deep sea fishing

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