scholarly journals Diel and Seasonal Occurrence Patterns of Drifting Fish Larvae in the Teima Stream, Okinawa Island

2010 ◽  
Vol 64 (2) ◽  
pp. 161-176 ◽  
Author(s):  
Ken Maeda ◽  
Katsunori Tachihara
Keyword(s):  
Fish Larvae ◽  
Seasonal Occurrence ◽  
Okinawa Island ◽  
Occurrence Patterns

Species composition and seasonal occurrence of fish larvae and juveniles in the Shimanto Estuary, Japan

2002 ◽  
Vol 68 (2) ◽  
pp. 364-370 ◽  
Author(s):  
SHINJI FUJITA ◽  
IZUMI KINOSHITA ◽  
ISAO TAKAHASHI ◽  
KENSAKU AZUMA
Keyword(s):  
Species Composition ◽  
Fish Larvae ◽  
Seasonal Occurrence ◽  
Larvae And Juveniles

The box-balance model: a new tool to assess fish larval survival, applied to field data on two small pelagic fish

2020 ◽  
Vol 650 ◽  
pp. 289-308 ◽  
Author(s):  
V Raya ◽  
J Salat ◽  
A Sabatés
Keyword(s):  
Field Data ◽  
Fish Larvae ◽  
Larval Growth ◽  
Warming Trend ◽  
Mortality Rates ◽  
Larval Survival ◽  
Pelagic Fish ◽  
Balance Model ◽  
Small Pelagic Fish ◽  
Mesoscale Structures

This work develops a new method, the box-balance model (BBM), to assess the role of hydrodynamic structures in the survival of fish larvae. The BBM was applied in the northwest Mediterranean to field data, on 2 small pelagic fish species whose larvae coexist in summer: Engraulis encrasicolus, a dominant species, and Sardinella aurita, which is expanding northwards in relation to sea warming. The BBM allows one to quantify the contribution of circulation, with significant mesoscale activity, to the survival of fish larvae, clearly separating the effect of transport from biological factors. It is based on comparing the larval abundances at age found in local target areas, associated with the mesoscale structures (boxes), to those predicted by the overall mortality rate of the population in the region. The application of the BBM reveals that dispersion/retention by hydrodynamic structures favours the survival of E. encrasicolus larvae. In addition, since larval growth and mortality rates of the species are required parameters for application of the BBM, we present their estimates for S. aurita in the region for the first time. Although growth and mortality rates found for S. aurita are both higher than for E. encrasicolus, their combined effect confers a lower survival to S. aurita larvae. Thus, although the warming trend in the region would contribute to the expansion of the fast-growing species S. aurita, we can confirm that E. encrasicolus is well established, with a better adapted survival strategy.

Sign in / Sign up

Export Citation Format

Share Document