Vol. 61, 2022
Coexistence of Juvenile with
Adult Ocypode gaudichaudii at
Culebra Beach, Panama: A Temporal-spatial Partitioning Compromise
Adeline Y.P. Yong1
and Shirley S.L. Lim1,*
Lab, Natural Sciences and Science Education, NIE, Nanyang Technological
University, 1 Nanyang Walk, Singapore 637616, Republic of Singapore.
*Correspondence: E-mail: email@example.com;
E-mail: ADELINE-YONG@e.ntu.edu.sg (Yong)
Received 29 May 2021 / Accepted 28
Communicated by Benny K.K. Chan
The temporal-spatial resource use
patterns of juvenile and adult Ocypode
gaudichaudii were studied by comparing the zonation patterns and
activity budgets of the two life stages at Culebra Beach, Panama.
Burrow distribution of the crabs during the day and at night was
studied over six months. Diurnal activity budgets of 46 crabs (22
juveniles and 24 adults) were determined by observing seven predominant
behaviors upon emergence from their respective burrows when the burrow
zone is uncovered after the tide recedes. The behaviors comprise three
foraging-related activities (i.e.,
deposit-feeding, scavenging, and probing for food), the maintenance of
burrow, walking, staying within the burrow, and resting at the burrow
entrance. Juvenile crabs occupied a higher intertidal zone than the
adults and had a higher emergence
at night. This temporal-spatial habitat partitioning could
possibly reduce intraspecific competition between the two life stages,
thereby enabling their coexistence in the habitat as well as increasing
the survival rate of the juveniles, potentially raising the carrying
capacity of the population at Culebra Beach. All 46 crabs—regardless of
life stage—spent the highest mean proportion of time on
foraging-related activities. Out of the three feeding-related
behaviors, adults spent
most time on deposit-feeding while juveniles spent most time probing.
Only juveniles scavenged. In both life stages, a similar proportion of
time was spent maintaining the burrow and staying within the burrow.
Key words: Diel activity
pattern, Habitat selection, Intraspecific competition, Niche
partitioning, Resource use.
Yong AYP, Lim SSL. 2022. Coexistence of juvenile with adult Ocypode
gaudichaudii at Culebra Beach, Panama: a temporal-spatial
compromise. Zool Stud 61:8.