Linking spawning ground extent to environmental factors - patterns and dispersal during the egg phase of four North Sea fishes.
|Author(s)||Hoffle Hannes1, 2, 3, 11, Van Damme Cindy J. G.4, Fox Clive5, Lelievre Stephanie6, Loots Christophe6, Nash Richard D. M.7, 8, Vaz Sandrine9, Wright Peter J.10, Munk Peter1|
|Affiliation(s)||1 : Tech Univ Denmark, DTU Aqua, Natl Inst Aquat Resources, Kavalergarden 6, DK-2920 Charlottenlund, Denmark.
2 : Inst Marine Res, POB 1870 Nordnes, N-5817 Bergen, Norway.
3 : Hjort Ctr Marine Ecosyst Dynam, POB 1870 Nordnes, N-5817 Bergen, Norway.
4 : IMARES, Inst Marine Resources & Ecosyst Studies, Haringkade 1, NL-1976 CP Ijmuiden, Netherlands.
5 : Scottish Assoc Marine Sci, Scottish Marine Inst, Oban PA37 1QA, Argyll, Scotland.
6 : IFREMER, Lab Ressources Halieut, 150 Quai Gambetta,BP699, F-62321 Boulogne Sur Mer, France.
7 : Inst Marine Res, POB 1870, N-5817 Bergen, Norway.
8 : Hjort Ctr Marine Ecosyst Dynam, POB 1870, N-5817 Bergen, Norway.
9 : IFREMER, UMR MARBEC, Ave Jean Monnet,CS 30171, F-34203 Sete, France.
10 : Marine Scotland Sci, Marine Lab, 375 Victoria Rd, Aberdeen AB11 9DB, Scotland.
11 : Queens Univ Belfast, Sch Biol Sci, Med Biol Ctr, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland.
|Source||Canadian Journal Of Fisheries And Aquatic Sciences (0706-652X) (Canadian Science Publishing, Nrc Research Press), 2018-03 , Vol. 75 , N. 3 , P. 357-374|
|WOS© Times Cited||2|
|Note||Special issue “Dispersal during early life history of fish”, a product of the 39th Annual Larval Fish Conference, Vienna, Austria, 12–17 July 2015|
Previous studies have shown that four commercially important demersal species, namely cod (Gadus morhua), haddock (Melanogrammus aeglefinus), whiting (Merlangius merlangus) and plaice (Pleuronectes platessa) spawn in distinct areas across the North Sea. Based on two comprehensive ichthyoplankton surveys in 2004 and 2009, the present study uses Generalized Additive Mixed Models (GAMMs) to delimit these spawning grounds using the distribution of recently spawned eggs, investigates their relationship to specific environmental conditions and examines egg dispersal during their development. Results indicate that presence/absence of early stage eggs is more related to temporal and topographic variables, while egg densities are closely linked with hydrography. Egg distribution patterns were relatively consistent during development and only changed near hatching. Compared to historic observations, the location of the spawning grounds appeared stable on the broad scale but centres of egg abundance varied between the surveyed years. Potential effects of long-term climate change and anthropogenic short-term disturbances, such as seismic surveys, on fish reproduction are discussed, pointing out the demand for multi-species studies on these issues.