Lutjanus bohar

Grzelak, Katarzyna & Sørensen, Martin V., 2022, Echinoderes landersi Grzelak & amp; Sørensen 2022, sp. nov., Zoological Studies 55 (44), pp. 1-15 : 6-7

Lutjanus bohar

Between 2010 and 2015 the number of fish estimated to aggregate in the west reef of the research area ( Fig. 2 ) were 6,917 ± 2,920 in February, 7,417 ± 1200 in March and 5,600 ± 1,140 in April (n = 18) ( Fig. 5b ). They aggregated exclusively in the resting area of the west reef. The school never exceeded more than 10,000 individuals. The spawning aggregation formed every month throughout the year. Spawning started just after the quarter moon and spawning occurred until a few days before full moon ( Fig. 5b ). We observed a total of 18 periods from February 2010 until May 2015. The same aggregation behavior was observed in all the periods examined and feeding behavior was observed during the aggregating period.

Female 1

Female 2

Male 1

The fish sampled Female 1 561 492 3,200 82 2.56 35 - 38 Male 1 665 596 4,900 186 3.80 -

The fish sampled before 4days full moon.

Diel migration

Figures

Fig. 2. Observation site: southernmost reef of Peleliu Island. The “resting area” where sub-aggregate schools of S. spilurus and L. bohar gather are highlighted in yellow and red, respectively. The spawning ground is marked in white circle.

Fig. 5. A comparison of the mode of appearances: (a) S. spilurus between 2006 and 2009. The spawning aggregation formed two distinct periods of a year between February to April and September to November. Number of fish observed in the earlier period, between the full (open circle) and new (closed circle) moon are shown. (b) The mode of appearance of L. bohar between 2010 and 2013. The aggregation formed every month throughout the year. Representative modes of appearance observed between February and April were shown for direct comparison.