Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan

Har ett hummerfredningområde någon betydelse som avelsbank? Av Mats Ulmestrand, Havsfiskelaboratoriet, Lysekil Since 1989 a lobster (Homarus gammarus) fishing area of 1.05 km2 was closed and protected from all fishery except experimental fishery carried out by the Institute of Marine Research in Lys...

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Main Authors: Ulmestrand, Mats, Sellborn, Anders, Valentinsson, Daniel
Format: Report
Language:Swedish
Published: Havsfiskelaboratoriet 1996
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:havochvatten:diva-394
id ftsamwm:oai:DiVA.org:havochvatten-394
record_format openpolar
spelling ftsamwm:oai:DiVA.org:havochvatten-394 2023-05-15T16:34:45+02:00 Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan Ulmestrand, Mats Sellborn, Anders Valentinsson, Daniel 1996 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:havochvatten:diva-394 swe swe Havsfiskelaboratoriet Göteborg : Fiskeriverket Information från Havsfiskelaboratoriet, Lysekil 1988-1997, 1100-4517 1996:2 http://urn.kb.se/resolve?urn=urn:nbn:se:havochvatten:diva-394 info:eu-repo/semantics/openAccess lobster fishery mortality mouthparts suspension feeding hummer havskräfta avel föda fiske dödlighet mundelar suspensionsätning Fish and Aquacultural Science Fisk- och akvakulturforskning Environmental Sciences Miljövetenskap Report info:eu-repo/semantics/report text 1996 ftsamwm 2022-08-11T12:23:38Z Har ett hummerfredningområde någon betydelse som avelsbank? Av Mats Ulmestrand, Havsfiskelaboratoriet, Lysekil Since 1989 a lobster (Homarus gammarus) fishing area of 1.05 km2 was closed and protected from all fishery except experimental fishery carried out by the Institute of Marine Research in Lysekil. All caught lobster were tagged and released in the area again. This paper gives an estimation of the change in egg production while the fishing mortality on H. gammarus stops. Mundelarnas funktionella morfologi hos havskräfta. Av Anders Sellbom The Norway lobster (Nephrops norvegicus ) can be a suspension feeder, and the lobster use its mouth parts as a "landing-net". A feeding current was produced by the exopodite of the third maxillipeds and with the pleopods. This paper describes the morphology of the mouthparts with respect to suspension feeding. The activity of the mouthparts were tested during aquaria experiments. Crushed shrimps (Pandalus borealis) and nauplii of brine shrimps (Artemia salina) were used asprey. All mouthparts of N. norvegicus are covered with setae in different lenght and size. There are also different shapes among them. In general speaking there are long, serrate setae on the anteriormouthparts and short, stiff setae on the inner mouthparts. Food particles are trapped on the long, serrated setae on the outer mouthparts (mostly the third maxillipeds) and are transported by combing movements of the inner mouthparts to oesophagus. There was no significant difference in beatspeed of the exopodites. Three different sources were tested against each other: food (crushed shrimp or nauplii of brine shrimp), treatment (before, under and after addition of food) and the interaction food/treatment. Very large variance differences occurred within the same food group when tested for the interaction food/treatment. The explanation is that the exopodites do not beat simultanously and there are large speed differences between left and right exopodite. A two factor ANOVA analysis of variance was used as ... Report Homarus gammarus Pandalus borealis Swedish Agency for Marine and Water Management (DiVA) Hummer ENVELOPE(-50.100,-50.100,-83.283,-83.283) Norway
institution Open Polar
collection Swedish Agency for Marine and Water Management (DiVA)
op_collection_id ftsamwm
language Swedish
topic lobster
fishery
mortality
mouthparts
suspension feeding
hummer
havskräfta
avel
föda
fiske
dödlighet
mundelar
suspensionsätning
Fish and Aquacultural Science
Fisk- och akvakulturforskning
Environmental Sciences
Miljövetenskap
spellingShingle lobster
fishery
mortality
mouthparts
suspension feeding
hummer
havskräfta
avel
föda
fiske
dödlighet
mundelar
suspensionsätning
Fish and Aquacultural Science
Fisk- och akvakulturforskning
Environmental Sciences
Miljövetenskap
Ulmestrand, Mats
Sellborn, Anders
Valentinsson, Daniel
Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan
topic_facet lobster
fishery
mortality
mouthparts
suspension feeding
hummer
havskräfta
avel
föda
fiske
dödlighet
mundelar
suspensionsätning
Fish and Aquacultural Science
Fisk- och akvakulturforskning
Environmental Sciences
Miljövetenskap
description Har ett hummerfredningområde någon betydelse som avelsbank? Av Mats Ulmestrand, Havsfiskelaboratoriet, Lysekil Since 1989 a lobster (Homarus gammarus) fishing area of 1.05 km2 was closed and protected from all fishery except experimental fishery carried out by the Institute of Marine Research in Lysekil. All caught lobster were tagged and released in the area again. This paper gives an estimation of the change in egg production while the fishing mortality on H. gammarus stops. Mundelarnas funktionella morfologi hos havskräfta. Av Anders Sellbom The Norway lobster (Nephrops norvegicus ) can be a suspension feeder, and the lobster use its mouth parts as a "landing-net". A feeding current was produced by the exopodite of the third maxillipeds and with the pleopods. This paper describes the morphology of the mouthparts with respect to suspension feeding. The activity of the mouthparts were tested during aquaria experiments. Crushed shrimps (Pandalus borealis) and nauplii of brine shrimps (Artemia salina) were used asprey. All mouthparts of N. norvegicus are covered with setae in different lenght and size. There are also different shapes among them. In general speaking there are long, serrate setae on the anteriormouthparts and short, stiff setae on the inner mouthparts. Food particles are trapped on the long, serrated setae on the outer mouthparts (mostly the third maxillipeds) and are transported by combing movements of the inner mouthparts to oesophagus. There was no significant difference in beatspeed of the exopodites. Three different sources were tested against each other: food (crushed shrimp or nauplii of brine shrimp), treatment (before, under and after addition of food) and the interaction food/treatment. Very large variance differences occurred within the same food group when tested for the interaction food/treatment. The explanation is that the exopodites do not beat simultanously and there are large speed differences between left and right exopodite. A two factor ANOVA analysis of variance was used as ...
format Report
author Ulmestrand, Mats
Sellborn, Anders
Valentinsson, Daniel
author_facet Ulmestrand, Mats
Sellborn, Anders
Valentinsson, Daniel
author_sort Ulmestrand, Mats
title Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan
title_short Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan
title_full Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan
title_fullStr Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan
title_full_unstemmed Hummer. Fredningsområde som avelsbank? : Havskräfta. Mundelarnas byggnad: Stora kräftdjur. Födointag genom filtrering: Havskräfta. Bohålsräkning från ytan
title_sort hummer. fredningsområde som avelsbank? : havskräfta. mundelarnas byggnad: stora kräftdjur. födointag genom filtrering: havskräfta. bohålsräkning från ytan
publisher Havsfiskelaboratoriet
publishDate 1996
url http://urn.kb.se/resolve?urn=urn:nbn:se:havochvatten:diva-394
long_lat ENVELOPE(-50.100,-50.100,-83.283,-83.283)
geographic Hummer
Norway
geographic_facet Hummer
Norway
genre Homarus gammarus
Pandalus borealis
genre_facet Homarus gammarus
Pandalus borealis
op_relation Information från Havsfiskelaboratoriet, Lysekil 1988-1997, 1100-4517
1996:2
http://urn.kb.se/resolve?urn=urn:nbn:se:havochvatten:diva-394
op_rights info:eu-repo/semantics/openAccess
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