Autumn larval fish assemblages in the northwest African Atlantic coastal zone -- Journal of Oceanology and Limnology,2017,35(3):515-527

	Cite this paper:
	ABDELOUAHAB Hinde, BERRAHO Amina, BAIBAI Tarik, AGOUZOUK Aziz, MAKAOUI Ahmed, ERRHIF Ahmed. Autumn larval fish assemblages in the northwest African Atlantic coastal zone[J]. Journal of Oceanology and Limnology, 2017, 35(3): 515-527

Autumn larval fish assemblages in the northwest African Atlantic coastal zone

ABDELOUAHAB Hinde^1,2, BERRAHO Amina², BAIBAI Tarik², AGOUZOUK Aziz², MAKAOUI Ahmed², ERRHIF Ahmed¹

1 Faculty of Sciences Ain Chock, Hassan II University, B. P. 5366, Maarif, Casablanca, 20100, Morocco;
2 National Institute of Halieutic Research, Street Sidi Abderrahmane Club equestre Ould Jmel, Casablanca, 20100, Morocco

Abstract:

A study on the assemblage composition and vertical distribution of larval fish was conducted in the southern area of the Moroccan Atlantic coast in Autumn 2011. A total of 1 680 fish larvae taxa were identified from 21 families. The majority of the larvae were present in the upper layers. Clupeids were the most abundant larvae taxa followed by Myctophidae, Gadidae and Sparidae, hence the larval fish assemblages (LFA) were variable in different depth layers. Total fish larvae showed a preference for surface layers, and were mainly found above 75 m depth, with some exceptions. The maximum concentration of fish larvae was concentrated up to 25 m essentially above the thermocline, where chlorophyll a and mesozooplankton were abundant. Spatially, neritic families were located near the coast and at some offshore stations especially in the northern part, while oceanic families were more distributed towards offshore along the study area. Cluster analysis showed a segregation of two groups of larvae. However, a clear separation between neritic families and oceanic families was not found. Multivariate analysis highlighted the relationship between the distribution of larvae of different families and environmental parameters. Temperature and salinity seem to have been the factors that acted on associations of fish larvae. Day/night vertical distributions suggest there was not a very significant vertical migration, probably due to adequate light levels for feeding.

Key words: fish larvae|vertical distribution|association|hydrology|multivariate analysis

Received: 2015-10-24 Revised: 2016-01-08

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Articles by MAKAOUI Ahmed

Articles by ERRHIF Ahmed

References:
Ahlstrom E H. 1959. Vertical distribution of pelagic fish eggs and larvae off California and Baja California. U.S. Fish and Wildlife Service: Fishery Bulletin, 60(161): 107-146.
Arístegui J, Barton E D, Álvarez-Salgado X A, Santos A M P, Figueiras F G, Kifani S, Hernández-León S, Mason E, Machú E, Demarq H. 2009. Sub-regional ecosystem variability in the Canary current upwelling. Progress in Oceanography, 83(1-4): 33-48.
Auth T D, Brodeur R D, Fisher K M. 2007. Diel variation in vertical distribution of an offshore ichthyoplankton community off the Oregon coast. Fishery Bulletin, 105(3): 313-326.
Benazzouz A, Mordane S, Orbi A, Chagdali M, Hilmi K, Atillah A, Pelegrí J L, Demarq H. 2014. An improved coastal upwelling index from sea surface temperature using satellite-based approach – The case of the Canary Current upwelling system. Continental Shelf Research, 81: 38-54, http://dx.doi.org/10.1016/j.csr.2014.03.012.
Berraho A, Ettahiri O, Letourneur Y, Orbi A, Yahyaoui A. 2005. Importance des paramètres hydrologiques dans la distribution des œufs et larves des petits pélagiques du sud de l'Atlantique marocain. Cybium, 29(1): 21-31.
Berraho A, Ettahiri O, Brochier T, Benazzouz A, Larissi J, Makaoui A, Somoue L, Salah S, Hilmi K, Orbi A. 2012. Distribution des larves de sardine et d'anchois le long du filament du Cap Ghir (région nord-ouest Africaine). Journal des Sciences Halieutique et Aquatique, 6: 178-193.
Berraho A. 2007. Relations spatialisées entre milieu et ichtyoplancton des petits pélagiques de la côte Atlantique marocaine (zones centrale et sud). Ph. Doctor Thesis. Univ. Mohammed V Agdal, Rabat. 261p.
Bray R J, Curtis J T.1957. An ordination of the upland forest communities of southern Wisconsin. Ecological Monographs Journal, 27(4): 325-349.
Carassou L. 2008. Les assemblages de larves de poissons dans le lagon de Nouvelle-Calédonie: structure spatiotemporelle et relations avec les facteurs abiotiques et biotiques de l'environnement. Ph. Doctor Thesis. Ecole pratique des hautes études. Centre IRD de Nouméa, Nouvelle-Calédonie. 292p.
Demarcq H, Somoue L. 2015. Phytoplankton and primary productivity off northwest Africa. In: Valdés L, DénizGonzález I eds. Oceanographic and Biological Features in the Canary Current Large Marine Ecosystem. IOCUNESCO, IOC Technical Series, Paris. p.161-174.
Doyle M J, Morse W W, Kendall A W Jr. 1993. A comparison of larval fish assemblages in the temperate zone of the northeast Pacific and northwest Atlantic Oceans. Bulletin of Marine Science, 53(2): 588-644.
Ettahiri O, Berraho A, Houssa R, Ramzi A, Somoue L, Zizah S, Machu E. 2012. Characteristics of the spawning habitats of sardine, Sardina pilchardus, off the Moroccan Atlantic coast (21°N-26°N). FAO, Comptes rendues des pêches et de l'aquaculture. 18: 157-186.
Ettahiri O. 1996. Etude de la phase planctonique de la sardine, Sardina pilchardus (Walb.), et de l'anchois, Engraulis encrasicolus (L.) des côtes atlantiques marocaines. Ph. Doctor Thesis, Univ. Western Brittany, Brest. 252p.
Frank K T, Leggett W C. 1983. Multispecies larval fish associations: accident or adaptation? Canadian Journal of Fisheries and Aquatic Sciences, 40(6): 754-762.
G ray C A, Kingsford M J. 2003. Variability in thermocline depth and strength, and relationships with vertical distributions of fish larvae and mesozooplankton in dynamic coastal waters. Marine Ecology Progress Serial, 247: 211-224.
Gray C A, Miskiewicz A G. 2000. Larval fish assemblages in south-east Australian coastal waters: seasonal and spatial structure. Estuarine, Coastal and Shelf Science, 50(4): 549-570.
Gray C A. 1996. Do thermoclines explain the vertical distributions of larval fishes in the dynamic coastal waters of south-eastern Australia? Marine and Freshwater Research, 47(2): 183-190, http://dx.doi.org/10.1071/MF9960183.
Keane J P, Neira F J. 2008. Larval fish assemblages along the south-eastern Australian shelf: linking mesoscale nondepth-discriminate structure and water masses. Fisheries Oceanography, 17(4): 263-280.
Lee O, Nash R D M, Danilowicz B S. 2005. Small-scale spatiotemporal variability in ichthyoplankton and zooplankton distribution in relation to a tidal-mixing front in the Irish Sea. ICES Journal of Marine Science, 62(6): 1 021-1 036.
Makaoui A, Orbi A, Hilmi K, Zizah S, Larissi J, Talbi M. 2005. L'upwelling de la côte atlantique du Maroc entre 1994 et 1998. Comptes Rendus Geoscience, 337(16): 1 518-1 524.
Makaoui A. 2008. Etude de l'upwelling côtier de la côte atlantique marocaine et sa contribution à la sédimentologie du plateau continental. Ph. Doctor Thesis. Univ. Hassan II, Ben M'sik, Casablanca, Morocco. 163p.
Miller T J. 2002. Assemblages, communities and species interactions. In: Fuiman L A, Werner R G eds. Fishery science: the unique contributions of early life stages. Blackwell Science, Ltd. p.183-205.
Morote E, Olivar M P, Pankhurst P M, Villate F, Uriarte I. 2008. Trophic ecology of bullet tuna Auxis rochei larvae and ontogeny of feeding-related organs. Marine Ecology Progress Series, 353: 243-254.
Moyano M, Hernández-León S. 2011. Intra-and inter annual variability in the larval fish assemblage off Gran Canaria (Canary Islands) over 2005-2007. Marine Biology, 158(2): 257-273, http://dx.doi.org/10.1007/s00227-010-1556-8.
Moyano M, Rodríguez J M, Benítez-Barrios V M, HernándezLeón S. 2014. Larval fish distribution and retention in the Canary Current system during the weak upwelling season. Fisheries Oceanography, 23(3): 191-209.
Moyano M, Rodríguez J, Hernández-León S. 2009. Larval fish abundance and distribution during the late Winter bloom off gran Canaria Island, Canary Islands. Fisheries Oceanography, 18(1): 51-61.
Olivar M P, Emelianov M, Villate F, Uriarte I, Maynou F, Álvarez I, Morote E. 2010. The role of oceanographic conditions and plankton availability in larval fish assemblages off the Catalan coast (NW Mediterranean). Fisheries Oceanography, 19(3): 209-229.
Olivar M P, Salat J, Palomera I. 2001. Comparative study of spatial distribution patterns of the early stages of anchovy and pilchard in the NW Mediterranean Sea. Marine Ecology Progress Series, 217: 111-120.
Rodríguez J M, Barton E D, Hernández-León S, Arístegui J. 2004. The influence of mesoscale physical processes on the larval fish community in the Canaries CTZ, in summer. Progress in Oceanography, 62(2-4): 171-188.
Rodríguez J M, Hernández-León S, Barton E D. 1999. Mesoscale distribution of fish larvae in relation to an upwelling filament off Northwest Africa. Deep-Sea Research Part I: Oceanographic Research Papers, 46(11): 1 969-1 984.
Rodríguez J M, Hernández-León S, Barton E D. 2006. Vertical distribution of fish larvae in the Canaries-African coastal transition zone in summer. Marine Biology, 149(4): 885-897.
Sabatés A, Masó M. 1990. Effect of a shelf-slope front on the spatial distribution of mesopelagic fish larvae in the Western Mediterranean. Deep-Sea Research Part A. Oceanographic Research Papers, 37(7): 1 085-1 098.
Sabatés A, Salat J, Masó M. 2004. Spatial heterogeneity of fish larvae across a meandering current in the northwestern Mediterranean. Deep-Sea Research Part I: Oceanographic Research Papers, 51(4): 545-557.
Sabatés A. 2004. Diel vertical distribution of fish larvae during the winter-mixing period in the Northwestern Mediterranean. ICES Journal of Marine Science, 61(8): 1 243-1 252.
Sampey A, Meekan M G, Carleton J H, McKinnon A D, McCormick M I. 2004. Temporal patterns in distributions of tropical fish larvae on the north west Shelf of Australia. Marine and Freshwater Research, 55(5): 473-487.
Shepard D. 1968. A two-dimensional interpolation function for irregularly-spaced data. In: Proceedings of the 23rd ACM National Conference. ACM, New York. p.517-524.
Smith K A, Suthers I M. 1999. Displacement of diverse ichthyoplankton assemblages by a coastal upwelling event on the Sydney shelf. Marine Ecology Progress Series, 176: 49-62.
Smith K S, Gibbs M T, Middleton J H, Suthers I M. 1999. Short term variability in larval fish assemblages of the Sydney shelf: tracers of hydrographic variability. Marine Ecology Progress Series, 178: 1-15.
Somarakis S, Drakopoulos P, Filippou V. 2002. Distribution and abundance of larval fish in the Northern Aegean Seaeastern Mediterranean-in relation to early summer oceanographic conditions. Journal of Plankton Research, 24(4): 339-357.
Somarakis S, Isari S, Machias A. 2011a. Larval fish assemblages in coastal waters of central Greece: reflections of topographic and oceanographic heterogeneity. Scientia Marina, 75(3): 605-618.
Somarakis S, Ramfos A, Palialexis A, Valavanis V D. 2011b. Contrasting multispecies patterns in larval fish production trace inter-annual variability in oceanographic conditions over the N.E. Aegean Sea continental shelf (Eastern Mediterranean). Hydrobiologia, 670: 275-287.
Somoue L, Elkhiati N, Ramdani M, Lam Haoi T, Ettahiri O, Berraho A, Do Chi. 2005. Abundance and structure of copepod communities along the Atlantic coast of southern Morocco. Acta Adriatica, 46(1): 63-76.
Somoue L, Elkhiati N, Vaquer A, Ramdani M, Ettahiri O, Makaoui A, Berraho A. 2003. Contribution à l'étude des Diatomées dans l'écosystème pélagique côtier au sud de l'Atlantique marocain (21°N-26°30′N). Journal de Recherche Océanographique, 28: 1-13.
Ter Braak C J F, Verdonschot P F M. 1995. Canonical correspondence analysis and related multivariate methods in aquatic ecology. Aquatic Sciences, 57(3): 255-289.
Wiebe P, Boyd S, Cox J L. 1975. Relationships between zooplankton displacement volume, wet weight, dry weight, and carbon. Fishery Bulletin, 73(4): 777-786.