Population characteristics of the world's northernmost stocks of European lobster (Homarus gammarus) in Tysfjord and Nordfolda, northern Norway

  title={Population characteristics of the world's northernmost stocks of European lobster (Homarus gammarus) in Tysfjord and Nordfolda, northern Norway},
  author={Ann-Lisbeth Agnalt and Eva Farestveit and Kaare R. Gundersen and Knut Eirik J{\o}rstad and Tore S. Kristiansen},
  journal={New Zealand Journal of Marine and Freshwater Research},
  pages={47 - 57}
Abstract The northernmost self‐sustaining populations of European lobster (Homarus gammarus) are found north of the Arctic Circle (66°33'N), in Tysfjord and Nordfolda, two large, deep, and relatively warm fjord systems in northern Norway. In contrast to most other Norwegian lobster populations, these genetically distinct populations are still found at relative high densities. This paper presents results from surveys conducted in the fjord systems in 1964–65 and between 1992 to 2005, and… 

From the Adriatic to Northern Norway—geographic differences in moult increment and moult probability of the European lobster (Homarus gammarus), across the natural range

Regionally variable growth patterns, and localized adaptation to abiotic variables such as temperature, should therefore be taken into account when defining lobster stock assessment and fishery management areas.

Deformities in larvae and juvenile European lobster ( Homarus gammarus ) exposed to lower pH at two different temperatures

Investigation of the long-term effects of ocean acidification on the early life-cycle of lobster under two temperatures found deformities in both larvae and juveniles may affect respiration, the ability to find food, or sexual partners, and ability to swim.

Corrigendum to: Video-surveillance system for remote long-term in situ observations: recording diel cavity use and behaviour of wild European lobsters (Homarus gammarus)

Whether a remote video-surveillance system is suitable for long-term monitoring of European lobsters inhabiting an artificial cavity in a natural habitat is explored and a video-monitoring system that employs video motion detection (VMD) is described and used with the European lobster is described.

New insights about rearing conditions of Homarus gammarus larvae

Dissertacao para obtencao do Grau de Mestre em Aquacultura apresentada a ESTM - Escola Superior de Turismo e Tecnologia do Mar do Instituto Politecnico de Leiria.

Abundance, interaction and movement in a European lobster stock

Abundance, interaction and movement in a European lobster stock are studied to find out how lobster populations change over time and how lobster stocks change with age and sex.



Sub-arctic Populations of European Lobster, Homarus gammarus, in Northern Norway

The European lobster is distributed throughout the south and western regions of the Norwegian coast. A previous lobster allozyme investigation (1993) in the Tysfjord region, north of the Arctic

Sub-arctic populations of European lobster, Homarus gammarus , in northern Norway

This investigation supports the genetic distinctness of the Tysfjord population and shows that this is mainly due to a reduction (60–70%) in gene diversity (observed heterozygosities and number of alleles) compared with lobsters from more southern regions.

Growth, reproductive cycle, and movement of berried European lobsters (Homarus gammarus) in a local stock off southwestern Norway

A ban on landing berried females would be a valuable first step in attempting to increase the spawning biomass in order to reduce the fishing mortality in a heavily fished and depleted population.

Allozyme variation in European lobster (Homarus gammarus) throughout its distribution range

Pairwise FST comparisons, as well as a UPGMA dendrogram based on Nei's genetic distance (calculated from allele frequencies across the six loci investigated), confirm the separate main groupings.

Size–Maturity Relationships and Related Observations in Newfoundland Populations of the Lobster (Homarus americanus)

Female maturity ogives for five Newfoundland populations of the lobster (Homarus americanus) gave 50% maturities ranging from 71- to 76-mm carapace length, which generally increases with increasing size.

Mitochondrial DNA variation in the European lobster (Homarus gammarus) throughout the range

The results of this study show that mitochondrial DNA is a powerful tool for the determination of the genetic structure among lobster samples, which is important for a proper management policy designed to protect and to cultivate this species.

Biology of the lobster Homarus americanus

The Physiology of Gas Exchange, Circulation, Ion Regulation, and Nitrogenous Excretion: An Integrative Approach, B.R. Factor and J.L. Lavalli.

Reproductive biology

The development of a radioimmunoassay (RIA) for ovine fsh (ofsh) is described and an account of the technical difficulties associated with assays in ovine plasma is given.