Kostas Kapiris

Publications (43) View all

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  Available from: Kostas Kapiris

  Article: A bio-economic evaluation of the potential for establishing a commercial fishery on two newly developed stocks: The Ionian red shrimp fishery

  Jordi Guillen, Francesc Maynou, Christos Floros, David Sampson, Alexis Conides, Kostas Kapiris
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  ABSTRACT: : It has recently been shown that two deep-water red shrimp species (Aristeus antennatus and Aristaeomorpha foliacea) have the potential to support a viable fishery in the Greek Ionian Sea (eastern Mediterranean). In this article, we investigate (i) the evolution that this newly developed trawl shrimp fishery may undergo when subjected to different management measures, and (ii) the most suitable extraction rates considering the uncertainties about the resource. We further analyse the effects that potential future fuel price increases and changes in the market may have on the fishery. Forecasting the biological and economic consequences of management actions, as well as the effects of market changes on inputs and outputs before they are applied, may help managers select the most suitable management options. We approach the problem by means of bio-economic simulation analysis. The results of this study show that fishing effort can increase by 50-100%, increasing the fleet's profitability without jeopardizing the sustainability of the fishery.
  Scientia Marina 09/2012; · 1.28 Impact Factor
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  Article: Recovery of the commercial sponges in the central and southeastern Aegean Sea

  J. CASTRITSI-CATHARIOS, H. MILIOU, K. KAPIRIS, E. KEFALAS
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  ABSTRACT: The distribution and biometry of commercial sponges (Porifera) in coastal areas of the central and southeastern Aegean Sea was investigated to estimate the recovery progress of the populations eight years after the first appearance of sponge disease. Signs of the disease were detected only in 1.6% of the harvested sponges. Multivariate analysis on the percentage abundance of sponges showed two distinct groups among the sixteen fishing grounds studied: the eight deep (50-110 m) and the eight shallow ones (<40 m). The group from the deep depths consisted of Spongia officinalis adriatica, S. agaricina and S. zimocca. The infralittoral zone was characterized by the presence of Hippospongia communis, S. officinalis adriatica and S. officinalis mollissima. These bath sponges showed an enhanced abundance in the eastern Cretan Sea (S. Aegean Sea). In addition, their dimensions, particularly height, increased with increasing depth. It is indicated that the hydrographic conditions prevailing in the eastern Cretan Sea affected the repopulating processes of sponge banks. In each species, the biometric characteristics of the experimental specimens were similar to those of the sponges found in the market and harvested at respective depths prior to the appearance of sponge disease.
  Mediterranean Marine Science. 01/2012; 12:5-20.
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  Article: Review of alien decapods (Crustacea) in the Aegean Sea

  Kostas Kapiris, Tuncer Katağan, Suat A. Ates, Alexis Conides
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  ABSTRACT: The whole Aegean Sea hosts 27 alien decapod crustaceans (21 Indo-Pacific, 6 Atlantic species). Ten of these species (3 Dendrobranchyata, 1 Caridea, 6 Brachyura) were only reported along the Greek coasts of the Aegean Sea. Among them, six species were originated from the Indo-Pacific areas and four species from the Atlantic coasts. On the other hand, 6 of the 27 alien decapods were collected only on the Turkish Aegean coasts (5 Indo-Pacific species, 1 Atlantic species). The possible causes for this differentiation could be attributed to several factors.
  J. Black Sea/Mediterranean Environment. 01/2012; 18(2):177-187.
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  Article: Length-weight relationships for twenty one fish species caught in Argolikos Gulf (Central Aegean Sea, E. Mediterranean)

  Kapiris K., Klaoudatos D.
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  ABSTRACT: The length-weight relationship for both sexes of 21 fish species caught in Argolikos gulf (C. Aegean Sea, E. Mediterranean) using a variety of fishing gear, was estimated for the first time. Fishing took place between August 2007 and August 2008 and the fishing gear used included gill and trammel nets, long lines and beach-seines from 58 inshore fishing vessels. Allometry coefficient (b) for the majority of species (61%) was statistically significantly higher than 3.0, indicating positive allometry between length-weight in most species. The differences of the allometry coefficient (b) observed within the same species caught by different fishing gear, could be attributed mainly to the smaller mean fish length caught by the beach seine. The data obtained in the present study could serve as a useful tool in future studies in the wider study area and as a future reference for comparison reasons of similar parameters estimated in other Mediterranean areas.
  Turkish journal of zoology. 01/2011;
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  Article: Feeding ecology of the deep-water blue–red shrimp Aristeus antennatus

  Kapiris K., Thessalou-Legaki M.
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  ABSTRACT: The feeding habits of the deep-sea blue–red shrimp Aristeus antennatus were determined based on the analysis of 1047 stomach contents, sampled in the Greek Ionian Sea (E. Mediterranean). The diet of this economically and biologically important decapod was studied in relation to the season, size class and sex. The diet of A. antennatus consisted of 54 different prey categories, and belonged mainly to smaller crustaceans (e.g. natantian decapods, euphausiids, tanaidaceans), molluscs, polychaetes, chaetognaths and, to a lesser extent, fishes. The above prey categories consisted of 71–82% of the relative abundance and total occurrence for males and 61–81% for females. Females seemed to be better fed than males (stomach fullness, food quality). A. antennatus displayed a highly diversified diet and the different feeding patterns were discussed. Diet composition showed slight seasonal fluctuations. The observed slight differences on A. antennatus diet among the western, central and eastern Mediterranean could be attributed to the more oligotrophic character of the eastern part of the basin. The principal factors driving the changes in the feeding strategy of this decapod among the seasons are the increased energy demands related to sexual requirements and the food availability in the marine environment. The ontogenetic changes in the shrimp's diet were relatively clear. Larger individuals exhibited selecting prey with a good swimming capacity (e.g. fishes), while the smaller individuals consumed prey with low mobility (e.g. copepods, ostracods).
  J. Sea Research. 01/2011; 65:151-160.