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Size-related habitat use, aggregation patterns and abundance of anglerfish (Lophius budegassa) in the Mediterranean Sea determined by generalized additive modelling

Published online by Cambridge University Press:  19 September 2003

Christos Maravelias  and
Costas Papaconstantinou
Christos Maravelias*
Affiliation:
University of Thessaly, Department of Agriculture, Animal Production and Aquatic Environment, Fitoko Street, 38446 Magnesia, Greece
Costas Papaconstantinou
Affiliation:
National Centre for Marine Research, Agios Kosmas GR-16604, Athens, Greece
*
‡Corresponding author, e-mail: [email protected]
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Abstract

Spatial distribution patterns of black anglerfish, Lophius budegassa were examined in relation to size category, bathymetry, locational covariates, and season. Data were collected during a 2-y period (1998–1999) of quasi-synoptic seasonal sampling using demersal trawl surveys in the Aegean Sea. Generalized additive models (GAMs) were used to test the hypotheses that there was size-related variation in species' habitat associations and that the study area might serve as a nursery ground for black anglerfish. The current results supported these hypotheses. Data are presented that reveal size-dependent aggregation patterns of black anglerfish and an important habitat utilization of the north-eastern Aegean area. The modelled anglerfish abundances showed a strongly non-linear dependence on the explanatory covariates. The different size-classes exhibited significant seasonal effects and preferences for specific regions and distinct water depths. The present results also suggested that 1-y-old fish and potential spawners appeared to concentrate in the vicinity of the same areas. Two main areas of juvenile aggregations were detected in the deeper water regions of the study area on a seabed of around 300 m depth; both emerged in the proximity of the locations of larger fish. The bathymetric distribution of intermediate size anglerfish followed an inverse trend, with fish captured mainly in shallower waters. Results indicated a preferential aggregation of 1-y-old L. budegassa in the study area that is hypothesized to influence the supply of recruits to distant regions of the Aegean Sea.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 83 , Issue 5 , October 2003 , pp. 1171 - 1178
Copyright
Copyright © Marine Biological Association of the United Kingdom 2003

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References

Afonso-Dias, I.P. & Hislop, J.R.G., 1996. The reproduction of anglerfish Lophius piscatorius Linnaeus from the north-west coast of Scotland. Journal of Fish Biology, 49, 18–39.Google Scholar
Crozier, W.W., 1985. Observations on the food and feeding of the angler-fish Lophius piscatotius L., in the northern Irish Sea. Journal ofFish Biology, 27, 655–665.Google Scholar
Crozier, W.W., 1989. Age and growth of angler-fish (Lophius piscatorius L.) in the north Irish Sea. Fisheries Research, 7, 267–278.Google Scholar
Duarte, R., Azevedo, M., Landa, J. & Pereda, P., 2001. Reproduction of anglerfish (Lophius budegassa Spinola and Lophius piscatorius Linnaeus) from the Atlantic Iberian coast. Fisheries Research, 51, 349–361.Google Scholar
Hastie, T. & Tibshirani, R., 1990. Generalized additive models. London: Chapman & Hall.Google Scholar
Hislop, J.R.G., Gallego, A., Heath, M.R., Kennedy, F.M., Reeves, S.A. & Wright, P.J., 2001. A synthesis of the early life history of the anglerfish, Lophius piscatorius (Linnaeus, 1758) in northern British waters. ICES Journal Marine Science, 58, 70–86.Google Scholar
Hislop, J.R.G., Holst, J.C. & Skagen, D., 2000. Near-surface captures of post-juvenile anglerfish in the north-east Atlantic—an unsolved mystery. Journal of Fish Biology, 57, 1083–1087.Google Scholar
Landa, J., Pereda, P., Duarte, R. & Azevedo, M., 2001. Growth of anglerfish (Lophius piscatorius and L. budegassa) in Atlantic Iberian waters. Fisheries Research, 51, 363–376.Google Scholar
Mackinson, S., 2001. Integrating local and scientific knowledge: an example in fisheries science. Environmental Management, 27, 533–545.CrossRefGoogle Scholar
Maravelias, C.D., 1997. Trends in abundance and geographic distribution of North Sea herring in relation to environmental factors. Marine Ecology Progress Series, 158, 151–164.Google Scholar
Maravelias, C.D., 1999. Habitat selection and clustering of a pelagic fish: effects of topography and bathymetry on species dynamics. Canadian Journal of Fisheries and Aquatic Sciences, 56, 437–450.Google Scholar
Maravelias, C.D., 2001. Habitat associations of Atlantic herring in the Shetland area: influence of spatial scale and geographic segmentation. Fisheries Oceanography, 10, 259–267.Google Scholar
Maravelias, C.D. & Reid, D.G., 1997. Identifying the effects of oceanographic features and zooplankton on prespawning herring abundance using generalized additive models. Marine Ecology Progress Series, 147, 1–9.CrossRefGoogle Scholar
NSSG (National Statistical Service of Greece) Bulletins, 2000. Statistical Year Book. Athens, Greece.Google Scholar
Swartzman, G., Huang, C. & Kaluzny, S., 1992. Spatial analysis of Bering Sea groundfish survey data using generalized additive models. Canadian Journal of Fisheries and Aquatic Sciences, 49, 1366–1378.CrossRefGoogle Scholar
Theocharis, A. & Georgopoulos, D., 1993. Dense water formation over the Samothraki and Lemnos Plateaux in the North Aegean Sea (eastern Mediterranean Sea). Continental Shelf Research, 13, 919–939.Google Scholar
Theocharis, A., Nittis, K., Kontoyiannis, H., Papageorgiou, E. & Balopoulos, E., 1999. Climatic changes in the Aegean Sea influence the eastern Mediterranean thermohaline circulation (1986–1997). Geophysical Research Letters, 26, 1617–1620.CrossRefGoogle Scholar
Tsimenidis, N.C., 1980. Contribution to the study of the angler-fishes Lophius budegassa Spinola, 1807 and L. piscatorius L. 1758 in Greek Seas. National Center of Marine Research, Special Publication, no. 4, 188 pp.Google Scholar
Tsimenidis, N.C. & Ondrias, J.C., 1980. Growth studies on the anglerfishes: Lophius piscatorius L. 1758 and Lophius budegassa Spinola, 1807 in Greek waters. Thalassographica, 3, 63–94.Google Scholar
Wheeler, A., 1969. The fishes of the British Isles and north-west Europe. London: Macmillan.Google Scholar
Zervakis, V., Georgopoulos, D. & Drakopoulos, P., 2000. The role of the North Aegean in triggering the recent eastern Mediterranean climatic changes. Journal of Geophysical Research, 105, 26103–26116.CrossRefGoogle Scholar