Patterns of seasonal variation in lagoonal macrozoobenthic assemblages (Mellah lagoon, Algeria)

Magni, Paolo; Draredja, Brahim; Melouah, Khalil; Como, Serena

doi:10.1016/j.marenvres.2015.07.005

Cited by 26 publications

(12 citation statements)

References 64 publications

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“…Thus, in the present study we have sought to assess the population dynamics and secondary production of D. trunculus at two sites of the Gulf of Annaba in order to provide basic information for the development of strategies for the sustainable fishery of this bivalve. This study has been conducted in the framework of a long term cooperative regional effort aimed at contributing new knowledge to the biodiversity and ecosystem functioning of Southeastern Mediterranean marine and lagoon systems (Magni, 2003;Draredja et al, 2006;Magni et al, 2004Magni et al, , 2015.…”

Section: Introductionmentioning

confidence: 99%

Population dynamics and secondary production of Donax trunculus (Mollusca, Bivalvia) in the Gulf of Annaba (Northeast Algeria)

Hafsaoui

Draredja²,

Lasota

et al. 2016

Medit. Mar. Sci.

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The population dynamics and secondary production of the wedge clam Donax trunculus were studied in the Gulf of Annaba (Northeast Algeria) monthly for one year at a site close to the Annaba port and the Seybouse river, affected by industrial and agricultural pollution (Sidi Salem), and at a site more distant from major pollution sources, but exploited by fishery (Echatt). The number of individuals (N) was lower at Sidi Salem (36–148 ind m-2) than at Echatt (63–272 ind m-2) in most sampling dates, while the biomass was more variable from one date to another, with no consistent pattern of differences between sites. The condition index (CI), although slightly higher at Sidi Salem than at Echatt, showed at both sites a major increase in March/April, June/July and October, reflecting two main periods of gonads development and increase in the level of stored reserves at the end of the reproductive period. Consistently, the recruitment of D. trunculus ran from April to October with a major peak of abundance in spring and a minor one in early fall. The maximum age of D. trunculus was 3 years and the growth rate was highest in the first year. Annual somatic production (P) was lower at Sidi Salem (0.773 g AFDM m-2 yr-1) than at Echatt (1.262 g AFDM m-2 yr-1), possibly reflecting a lower mean annual biomass at Sidi Salem (1.642 AFDM m-2) than at Echatt (3.046 AFDM m-2), while the annual P/B ratio was similar between the two sites (i.e. 0.471 and 0.414 yr-1, respectively). Lower N and P at Sidi Salem compared to Echatt are consistent with the proximity of Sidi Salem to the industrial port of Annaba and low hydrodynamic conditions which may favor the accumulation of pollutants, such as hydrocarbons. On the other hand, moderate secondary production of D. trunculus at Echatt compared to other Mediterranean sites may be due to excessive harvesting. We suggest that the low secondary production described in this study should be taken into account for the development of sustainable strategies of clam exploitation in the Gulf of Annaba. In particular, effort should be made to reduce land-based pollution and to regulate the collection of D. trunculus according to the life cycle and production potential of this species.

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Section: Introductionmentioning

confidence: 99%

Population dynamics and secondary production of Donax trunculus (Mollusca, Bivalvia) in the Gulf of Annaba (Northeast Algeria)

Hafsaoui

Draredja²,

Lasota

et al. 2016

Medit. Mar. Sci.

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show abstract

“…In general, population dynamics of macrozoobenthos are controlled by salinity, DO, temperature, sediment properties, and food availability (Llansó 1992;Wilson and Parker 1996;Rossi and Lardicci 2002;Kanaya et al 2011;Magni et al 2015). In Gamo Lagoon, DO in the water column decreased to zero for several hours at night during summer to fall (Kurihara et al 1997;Kanaya and Kikuchi 2004).…”

Section: Discussionmentioning

confidence: 99%

Effects of sedimentary sulfide on community structure, population dynamics, and colonization depth of macrozoobenthos in organic-rich estuarine sediments

Kanaya

Uehara

Kikuchi

2016

Marine Pollution Bulletin

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“…In the case of Algeria, many studies describe the effect of agricultural pollutants and livestock manure (Nadira, 2008) from the two rivers "R'kibet and El Mellah" (Chaoui et al, 2006;Magni et al, 2015) on fish, mollusks, and crustaceans (Mebarki et al, 2015) in the El Mellah lagoon.…”

Section: Pressures From Agricultural Effluentsmentioning

confidence: 99%

“…The degradation of environmental state due to organic overenrichment of sediments of El Mellah lagoon (Algeria) has decreased the biodiversity and the availability of seafood in some areas, especially during the summer of 2015 (Magni et al, 2015).…”

Section: Impact (On Human Welfare) In North African Lagoonsmentioning

confidence: 99%

Social-Environmental Analysis for the Management of Coastal Lagoons in North Africa

Mahrad

Abalansa

Newton

et al. 2020

Front. Environ. Sci.

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Patterns of seasonal variation in lagoonal macrozoobenthic assemblages (Mellah lagoon, Algeria)

Cited by 26 publications

References 64 publications

Population dynamics and secondary production of Donax trunculus (Mollusca, Bivalvia) in the Gulf of Annaba (Northeast Algeria)

Population dynamics and secondary production of Donax trunculus (Mollusca, Bivalvia) in the Gulf of Annaba (Northeast Algeria)

Effects of sedimentary sulfide on community structure, population dynamics, and colonization depth of macrozoobenthos in organic-rich estuarine sediments

Social-Environmental Analysis for the Management of Coastal Lagoons in North Africa

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