Size at maturation, sex differences, and pair density during the mating season of the Indo-Pacific beach star Archaster typicus (Echinodermata: Asteroidea) in the Philippines

  title={Size at maturation, sex differences, and pair density during the mating season of the Indo-Pacific beach star Archaster typicus (Echinodermata: Asteroidea) in the Philippines},
  author={Arthur R. Bos and Girley S. Gumanao and Benjamin Mueller and Marjho M. Saceda},
  journal={Invertebrate Reproduction \& Development},
  pages={113 - 119}
Mating of the relatively common sea star, Archaster typicus, provides an excellent opportunity to study maturation processes and behavioral differences between males and females, since monomorphism does not allow separation under normal conditions. The present study determined biological and behavioral features of males and females during the mating season in the Davao Gulf (Philippines). Thousands of pairs were observed in September and October 2008 with a mean density of 3 pairs m−2. Around… 
Population size structure, growth, arm number and damage in the sea star Archaster angulatus Müller and Troschel, 1842 (Echinodermata: Asteroidea)
Abstract Monthly sampling for the sea star Archaster angulatus revealed at least four cohorts with linear growth in the 0+ and 1+ year groups to about 26 months after which growth slows and conforms
Rate of natural mortality in the sea star Archaster angulatus (Echinodermata: Asteroidea)
  • J. Keesing
  • Environmental Science
    Journal of the Marine Biological Association of the United Kingdom
  • 2017
A. angulatus is intermediate among species which exhibit the extremes of life history strategies, that is, those which grow very rapidly and may live just two years or less and those with very slow growth rates and which may live for decades.
The Sea Stars ( Echinodermata : Asteroidea ) :
  • Environmental Science
  • 2018
The Sea stars (Asteroidea: Echinodermata) are comprising of a large and diverse groups of sessile marine invertebrates having seven extant orders such as Brisingida, Forcipulatida, Notomyotida,
The lunar cycle determines availability of coral-reef fishes at fish markets.
During 139 visits between March 2009 and May 2011, it was found that the availability of reef fishes at a local fish market in the Philippines was highly affected by the lunar cycle. The number of


Synchronous aggregated pseudo-copulation of the sea star Archaster angulatus Müller & Troschel, 1842 (Echinodermata: Asteroidea) and its reproductive cycle in south-western Australia
Mass individual pairing or pseudo-copulation of the sea star Archaster angulatus was observed in November and December 2009, suggesting a late-spring/summer spawning period for this species on the west coast of Australia, and Histological sections of gonads confirmed that sea stars are in peak reproductive condition in October and November and are fully spent by January.
Ontogenetic habitat shift, population growth, and burrowing behavior of the Indo-Pacific beach star, Archaster typicus (Echinodermata; Asteroidea)
This is one of the first studies to document an ontogenetic habitat shift for sea stars and provides new biological information as a basis for management of harvested A. typicus populations.
Mating behaviour and reproductive cycle of Archaster typicus (Echinodermata: Asteroidea)
The reproductive cycle, the mechanism of male-on-female pairing behavior and the spawning behavior of Archaster typicus Müller et Troschel are examined, which leads to simultaneous spawning, increasing the probability of fertilization.
Population dynamics, reproduction and growth of the Indo-Pacific horned sea star, Protoreaster nodosus (Echinodermata; Asteroidea)
Density and biomass did not change significantly during reproduction, but sea stars avoided intertidal habitats, and potential effects of ornamental collection on the sea star populations are discussed.
Abundance, spatial distribution, and size structure of the sea star Protoreaster nodosus in Palau, with notes on feeding and reproduction
Manipulations of density and spatial distribution showed that sea stars reestablish pre-manipulation densities and nearest-neighbor spacing within 2-5 d, suggesting these sea stars are important consumers and bioturbators in sedimentary habitats.
Long-term study of gamete release in a broadcast-spawning holothurian: predictable lunar and diel periodicities
The individual reproductive cycle is apparently longer than the monthly spawning periodicity observed at the population level, enabling I. fuscus populations to be reproductive year round.
Population characteristics and biology of two populations of Archaster angulatus (Echinodermata: Asteroidea) in different habitats off the central-western Australian coast
Given the abundance of this species in nearshore habitats dominated by sediment, it is likely to be ecologically important, however much of the biology and ecology of the species, even its diet, remain unknown.
Mating behavior of a brooding Antarctic asteroid, Neosmilaster georgianus
Spawning behavior and male-female superposition of Neosmilaster georgianus, a common brooding asteroid, were observed both in the field and the laboratory at Palmer Station, Antarctica, during the austral spring of 1991, marking the first reported instance of aggregative spawning in an Antarctic echinoderm.
Testing for the Effects of Seasonal and Lunar Periodicity on the Reproduction of the Edible Sea Urchin Tripneustes gratilla (L) in Kenyan Coral Reef Lagoons
There was a significant relationship between gonad index and lunar day with spawning occurring between lunar day 7 and 21, but spawning was not in perfect synchrony in the population.