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Effects of variation in initial settlement on distribution and abundance of Podoclavella moluccensis Sluiter

Journal Article


Abstract


  • The relationships between initial density of settling larvae, the subsequent density of recruits, and the final density of adult colonies, were examined in the colonial ascidian Podoclavella moluccensis Sluiter (Clavelinidae: Aplousobranchia) at Edithburgh Pier, South Australia, Australia. Recruit mortality was independent of the initial settlement density, consequently the density of recruits showed a strong positive relationship with the initial density of settling larvae. Hence, the number of settling larvae could be reliably inferred from estimates of recruitment, at least 1 month after settlement. In 2 consecutive yr the density of adult colonies was a significant positive function of the density of recruits. Recruit mortality was weakly but significantly correlated with recruit density in the 1st year and was not correlated with density in the 2nd yr. An estimated 6.1% of the larvae released, subsequently settled and only 0.56% survived to adulthood. The initial settlement density of these larvae was an important determinant of the distribution and abundance of adult colonies. �� 1988.

Publication Date


  • 1988

Citation


  • Davis, A. R. (1988). Effects of variation in initial settlement on distribution and abundance of Podoclavella moluccensis Sluiter. Journal of Experimental Marine Biology and Ecology, 117(2), 157-167. doi:10.1016/0022-0981(88)90223-7

Scopus Eid


  • 2-s2.0-0024258542

Start Page


  • 157

End Page


  • 167

Volume


  • 117

Issue


  • 2

Place Of Publication


Abstract


  • The relationships between initial density of settling larvae, the subsequent density of recruits, and the final density of adult colonies, were examined in the colonial ascidian Podoclavella moluccensis Sluiter (Clavelinidae: Aplousobranchia) at Edithburgh Pier, South Australia, Australia. Recruit mortality was independent of the initial settlement density, consequently the density of recruits showed a strong positive relationship with the initial density of settling larvae. Hence, the number of settling larvae could be reliably inferred from estimates of recruitment, at least 1 month after settlement. In 2 consecutive yr the density of adult colonies was a significant positive function of the density of recruits. Recruit mortality was weakly but significantly correlated with recruit density in the 1st year and was not correlated with density in the 2nd yr. An estimated 6.1% of the larvae released, subsequently settled and only 0.56% survived to adulthood. The initial settlement density of these larvae was an important determinant of the distribution and abundance of adult colonies. �� 1988.

Publication Date


  • 1988

Citation


  • Davis, A. R. (1988). Effects of variation in initial settlement on distribution and abundance of Podoclavella moluccensis Sluiter. Journal of Experimental Marine Biology and Ecology, 117(2), 157-167. doi:10.1016/0022-0981(88)90223-7

Scopus Eid


  • 2-s2.0-0024258542

Start Page


  • 157

End Page


  • 167

Volume


  • 117

Issue


  • 2

Place Of Publication