Abstract. Saleky D, Setyobudiandi I, Toha HA, Takdir M, Madduppa HH. 2016. Length-weight relationship and population genetic of two marine gastropods species (Turbinidae: Turbo sparverius and Turbo bruneus) in the Bird Seascape Papua,. Turbo sparverius and Turbo bruneus are herbivorous grazers gastropod that lived on the rocky intertidal area, which have a role in maintaining algae on the intertidal ecosystem. Local people in Papua have exploited them for food and souvenirs. Even though this exploitation might affect their genetic diversity and population, a study of the genetic structure of these species has not been previously reported. This study aimed to analyze the morphometric, genetic diversity, population structure and connectivity of T. sparverius and T. bruneus in coastal water of West Papua, Indonesia. The results showed that the growth pattern of T. sparverius and T. bruneus in all populations were negative allometric, which means that weight gain was slower than length. Haplotype diversity value of all population T. sparverius and T. bruneus were 0.657-0.705 and 0.739-0.816, respectively. In addition, the haplotype diversity of each population showed a high level of diversity. The genetic structure was found in all population of T. sparverius and T. bruneus with F ST value-0.037-0.201 and 0.031, respectively. Population structure and phylogenetic tree showed the closeness of genetic due to gene flow between both T. sparverius and T. bruneus. Genetic distance value between populations T. sparverius and T. bruneus are very low were 0.002 and 0.003-0.004, respectively. High genetic similarity might occur due to condition and direction of current flow mediating of gene transport among population, and the similarity of habitats in each population.

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Kima merupakan salah satu jenis molusca laut yang banyak ditemukan di perairan Raja Ampat. Hewan ini dilindungi di seluruh dunia termasuk di Indonesia. Penelitian ini dilakukan pada bulan Maret-April 2014, di perairan Amdui yang memiliki ekosistem terumbu karang, dan ditetapkan 3 lokasi pengamatan yaitu: Pulau Ayem, Teluk Sawawris dan Teluk Sawros. Metode yang digunakan pada penelitian ini adalah metode observasi dengan teknik belt transek, dan bertujuan untuk mengetahui jenis dan kelimpahan kima di perairan Amdui. Kima yang ditemukan di perairan laut Kampung Amdui Kabupaten Raja Ampat yaitu 8 jenis terdiri dari T. crocea, T. maxima, T. squamosa, T .gigas, H. porcellanus, H. hippopus, T. tevoroa dan T.derasa. Kelimpahan relatif kima pada stasiun I tertinggi didominasi oleh jenis T. maxima dengan persentase 48.387 % dengan kelimpahan relatif terendah pada jenis T.squamosa dengan persentase 3.225 % dan kepadatan terendah pada jenis T.squamosa dengan persentase 0.002 individu/m2 .. Kelimpahan relative kima tertinggi pada stasiun II didominasi oleh jenis T. maxima yaitu 38.805 % dan kelimpahan relative terendah pada jenis T. squamosa adalah 2.985%. Kepadatan terendah adalah 0.004 individu/m2 pada jenis T.maxima.Sedangkan kepadatan tertinggi pada jenis T. maxima adalah 0.052 terdapat pada stasiun II. Kelimpahan relative kima tertinggi pada stasiun III didominasi oleh jenis T.crocea yaitu 139.860%, dan dengan kelimpahan relative terendah pada jenis T.tevoroa adalah 0.699% dengan kepadatan kepadatan tertinggi pada jenis T.crocea adalah 0.112 individu/m2 .

Sailfin catfish indigenous to South America are very popular ornamental fish, having previously been introduced to many regions outside their native range. Two species, namely Pterygoplichthys disjunctivus and P. pardalis, are illegal but widespread in Indonesia. They have formed self-sustaining populations, exploited for feeding of domestic animals and locally for human consumption. Also possible hybrids of the two mentioned species were recorded. The surveyed populations were considered established which perfectly fits with the climate matching analysis. Further monitoring and inspection of regions highlighted to be suitable for sailfin catfish is recommended.