Growth and production of Donax striatus (Bivalvia: Donacidae) from Las Balsas beach, Gibara, Cuba
Fuente:
Redalyc
Salvato in:
| Autore principale: | |
|---|---|
| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad de Costa Rica
2015
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1876471806578130944 |
|---|---|
| author | Frank A. Ocaña |
| author_facet | Frank A. Ocaña |
| contents | Growth and production of Donax striatus (Bivalvia: Donacidae) from Las Balsas beach, Gibara, Cuba Frank A. Ocaña Biología growth biomass mortality sandy beaches Donax striatus Clams of the genusDonaxare worldwide the dominating group of the invertebrate community onsandy beaches. They are primary consumers that provide a significant abundance and biomass to the ecosystem.In the Caribbean,Donax striatushas an important role for nature and human, nonetheless studies on the popula-tion dynamics of this beach clam are scarce and no information exists on secondary production of this species.Growth parameters and secondary production ofD. striatuswere estimated from February 2008 to November2009 at Las Balsas beach, Northeastern Cuba, in order to provide basic information for management purposes.In each month 45 samples were taken by means of a PVC corer of 0.025 m2area and sieved with a 1 mm mesh.Animals were measured and weighted with and without shell. A total of 5 471 specimens were collected duringthe sampling period. Shell length ranged from 2.7-33.3 mm. Growth parameters estimated from length frequencydata were L∞= 36.1 mm, K= 0.8/yr and t0= 0.2/yr. The growth performance resulted in values of Φ ́= 3.02. Lifespan was 2.4 yrs and mortality rate was 3.07 /yr. In 2008, mean abundance ofD. striatusranged between 17.1-770.7 ind./m2. In 2009 the lowest mean abundance was 34.4 and the highest was 892.5 ind./m2. During 2009biomass and production was more than twice higher in comparison with 2008. Individual production showedhighest values in the 24 mm shell size (3.74 g/m2.yr) and 25 mm (0.71 g/m2.yr), considering mass with shell andwithout shell,respectively. During 2009 abundance of individuals with 15 mm shell length or more increasedresulting in higher biomass and production, compared to 2008. Using the conversion factor of wet mass to ashfree dry mass (AFDM), annual production ranged between 2.87-6.11 g AFDM/m2.yr, resulting in a turnoverrate (P/B) between 5.11 and 3.47 in 2008 and 2009, respectively. The rapid growth and high turnover rate ofD. striatussuggest a rapid recovery of the population. These results support the idea that this beach clam is animportant resource at Las Balsas beach. Thus its exploitation must continue with caution, and only at the levelof a recreational fishery. Rev. Biol. Trop. 63 (3): 639-646. Epub 2015 September 01. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44939781007 https://www.redalyc.org/journal/449/44939781007/ https://www.redalyc.org/journal/449/44939781007/html/ https://www.redalyc.org/journal/449/44939781007/44939781007.epub https://www.redalyc.org/journal/449/44939781007/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.63 |
| format | Artículo científico |
| id | redalyc_44939781007 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Growth and production of Donax striatus (Bivalvia: Donacidae) from Las Balsas beach, Gibara, Cuba Frank A. Ocaña Biología growth biomass mortality sandy beaches Donax striatus Growth and production of Donax striatus (Bivalvia: Donacidae) from Las Balsas beach, Gibara, Cuba Frank A. Ocaña Biología growth biomass mortality sandy beaches Donax striatus Clams of the genusDonaxare worldwide the dominating group of the invertebrate community onsandy beaches. They are primary consumers that provide a significant abundance and biomass to the ecosystem.In the Caribbean,Donax striatushas an important role for nature and human, nonetheless studies on the popula-tion dynamics of this beach clam are scarce and no information exists on secondary production of this species.Growth parameters and secondary production ofD. striatuswere estimated from February 2008 to November2009 at Las Balsas beach, Northeastern Cuba, in order to provide basic information for management purposes.In each month 45 samples were taken by means of a PVC corer of 0.025 m2area and sieved with a 1 mm mesh.Animals were measured and weighted with and without shell. A total of 5 471 specimens were collected duringthe sampling period. Shell length ranged from 2.7-33.3 mm. Growth parameters estimated from length frequencydata were L∞= 36.1 mm, K= 0.8/yr and t0= 0.2/yr. The growth performance resulted in values of Φ ́= 3.02. Lifespan was 2.4 yrs and mortality rate was 3.07 /yr. In 2008, mean abundance ofD. striatusranged between 17.1-770.7 ind./m2. In 2009 the lowest mean abundance was 34.4 and the highest was 892.5 ind./m2. During 2009biomass and production was more than twice higher in comparison with 2008. Individual production showedhighest values in the 24 mm shell size (3.74 g/m2.yr) and 25 mm (0.71 g/m2.yr), considering mass with shell andwithout shell,respectively. During 2009 abundance of individuals with 15 mm shell length or more increasedresulting in higher biomass and production, compared to 2008. Using the conversion factor of wet mass to ashfree dry mass (AFDM), annual production ranged between 2.87-6.11 g AFDM/m2.yr, resulting in a turnoverrate (P/B) between 5.11 and 3.47 in 2008 and 2009, respectively. The rapid growth and high turnover rate ofD. striatussuggest a rapid recovery of the population. These results support the idea that this beach clam is animportant resource at Las Balsas beach. Thus its exploitation must continue with caution, and only at the levelof a recreational fishery. Rev. Biol. Trop. 63 (3): 639-646. Epub 2015 September 01. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44939781007 https://www.redalyc.org/journal/449/44939781007/ https://www.redalyc.org/journal/449/44939781007/html/ https://www.redalyc.org/journal/449/44939781007/44939781007.epub https://www.redalyc.org/journal/449/44939781007/movil en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.63 |
| title | Growth and production of Donax striatus (Bivalvia: Donacidae) from Las Balsas beach, Gibara, Cuba |
| topic | Biología growth biomass mortality sandy beaches Donax striatus |
| url | https://www.redalyc.org/articulo.oa?id=44939781007 https://www.redalyc.org/journal/449/44939781007/ https://www.redalyc.org/journal/449/44939781007/html/ https://www.redalyc.org/journal/449/44939781007/44939781007.epub https://www.redalyc.org/journal/449/44939781007/movil |