Reciprocal Hybrids among Diploid, Tetraploid Dojo Loach,Misgurnus anguillicaudatus, and Large-scale Loach,Paramisgurnus dabryanus: Fertilization, Survival and Growth Performance

Abstract This study investigated the effects on survival, growth performance and water quality of algae, yeast and photosynthetic bacteria as diets for larval and immature/mature Streptocephalus sirindhornae. Survival of the larvae fed with the alga Chlorella vulgaris and the photosynthetic bacterium Rhodopseudomonas faecalis for 5 days was higher than 80%, while those fed with the yeast Saccharomyces cerevisiae was 4.4%. After feeding the 6-day-old fairy shrimp until they reached 30 days of age, those fed with bacteria showed the highest survival and growth rate. Ammonia, nitrate and nitrite concentrations in the water treated with R. faecalis were the lowest. The highest ammonia concentration, the lowest dissolved oxygen, and excessive turbidity were found in the yeast treatment. Frequent water replacement could not overcome this, which resulted in the low survival rate. Utilization of photosynthetic bacteria in fairy shrimp culture is for the first time reported herein, and the disadvantages of using yeast in S. sirindhornae cultivation are discussed.

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The effect of temperature on the physiological condition and growth performance of freshwater eel elver Anguilla bicolor bicolor McClelland, 1844

Jurnal Akuakultur Indonesia ◽

10.19027/jai.17.2.181-190 ◽

2018 ◽

Vol 17 (2) ◽

pp. 181

Author(s):

Latifa Fekri ◽

Ridwan Affandi ◽

Muhammad Fajar Rahardjo ◽

Tatag Budiardi ◽

Charles Parningotan Haratua Simanjuntak ◽

...

Keyword(s):

Growth Performance ◽

Physiological Condition ◽

Effect Of Temperature ◽

Aquatic Animal ◽

Metabolism Rate ◽

Randomized Design ◽

Freshwater Eel ◽

Survival And Growth ◽

Physiology Laboratory ◽

Different Levels

ABSTRACT This study aimed to analyze the effect of water temperature on the physiological condition and growth performance of freshwater eel elver Anguilla bicolor bicolor (McClelland, 1844). This study was conducted in March 2017 at the Physiology Laboratory of Aquatic Animal, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University. The study used a completely randomized design with five different levels of temperature (22°C, 24°C, 26°C, 28°C, and 30°C) as treatments with two replications. The size of elver was 2‒3 g. Fish were fed with 1 mm pellet containing 45% of protein. The feeding level was 7 % of fish biomass and the feeding frequency was two times a day. The results showed that temperatures range from 24‒30°C could be used for freshwater eel elver rearing and 28‒30°Cwere the best temperatures to support survival and growth performance of eel elver. A temperature of 24°C was the best temperature that could reduce the metabolism rate and did not cause stress on the elver. Keywords: elver, physiological conditions, growth performance, metabolism, temperature ABSTRAK Penelitian dengan tujuan menganalisis pengaruh suhu terhadap kondisi fisiologis dan kinerja pertumbuhan elver ikan sidat (Anguilla bicolor bicolor McClelland, 1844) telah dilakukan pada bulan Maret 2017 di Laboratorium Fisiologi Hewan Air FPIK IPB. Penelitian menggunakan rancangan acak lengkap dengan lima perlakuan suhu berbeda (22°C, 24°C, 26°C, 28°C, dan 30°C) dengan masing-masing dua ulangan. Ukuran benih yang digunakan 2‒3 g. Pakan yang diberikan berupa pellet berukuran 1 mm dengan kadar protein 45%. Jumlah pakan yang diberikan (FR) adalah 7% dari biomassa ikan dan diberikan dua kali sehari. Hasil penelitian menunjukkan bahwa kisaran suhu 24‒30°C dapat digunakan dalam pemeliharaan elver ikan sidat, dan suhu 28‒30°C merupakan suhu yang sangat baik untuk mendukung kelangsungan hidup dan pertumbuhan elver ikan sidat. Suhu media 24°C adalah suhu terbaik yang dapat menekan laju metabolisme dengan tidak menyebabkan stres pada elver ikan sidat. Kata kunci: elver, kondisi fisiologis, kinerja pertumbuhan, metabolisme, suhu

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Evaluation of Pangasius djambal Bleeker 1846 and Pangasianodon hypophthalmus (Sauvage 1878) Hybrids: Biometric, Growth, and Ovarian Maturation

Buletin Plasma Nutfah ◽

10.21082/blpn.v18n1.2012.p32-37 ◽

2016 ◽

Vol 18 (1) ◽

pp. 32

Author(s):

Rudhy Gustiano ◽

Anang H. Kristanto ◽

Evi Tahapari ◽

Bambang Iswanto

Keyword(s):

Growth Performance ◽

Morphological Analysis ◽

Ovarian Development ◽

Wild Population ◽

Parental Species ◽

Fish Production ◽

Pangasianodon Hypophthalmus ◽

Reciprocal Hybrids ◽

Potential Impact ◽

Aquaculture Production

Evaluasi Karakter Biometrik, Pertumbuhan, dan Perkembangan Telur Hibrida Pangasius Djambal Bleeker 1846 dan Pangasianodon Hypophthalmus (Sauvage 1878). Rudhy Gustiano, Anang H. Kristanto, Evi Tahapari, dan Bambang Iswanto. Program hibridisasi telah lama digunakan untuk meningkatkan produksi perikanan, lebih dari tiga dekade. Perhatian besar terhadap program hibridisasi merupakan kekhawatiran pengaruhnya terhadap populasi alami. Oleh karena itu, diperlukan penyediaan alat untuk mengidentifikasi secara cepat dan akurat di lapang. Kajian ini bertujuan untuk meneliti karakter biometrik, keragaan pertumbuhan, dan perkembangan telur Pangasius djambal dan Pangasianodon hypophthalmus dan hibridanya. Analisis morfologi secara lengkap dilakukan pada hibrida. Uji pertumbuhan di kolam tanah dan pengamatan terhadap perkembangan telur juga diamati. Hasil pengamatan morfometrik dan meristik memperlihatkan bahwa hibrida memiliki karakter antara kedua induk asli, kecuali jumlah gigi tapis insang yang lebih sedikit dibandingkan dengan tetuanya. Pengujian pertumbuhan di kolam tanah memperlihatkan hibrida memiliki pertumbuhan yang lebih cepat dibandingkan dengan tetuanya, sedangkan perkembangan telur hibrida menunjukkan abnormal. Perkembangan telur tidak pernah mencapai kematangan sempurna, sebagian besar rusak dan berlemak. Dari kajian yang dilakukan, dapat dikemukakan bahwa hibrida P. djambal and P. hypophthalmus adalah hibrida yang sesungguhnya. Hibrida ini dapat digunakan sebagai benih sebar untuk kegiatan produksi budi daya karena dapat dideteksi dengan mudah dari kedua tetuanya, lebih cepat tumbuh, dan tidak dapat berkembang biak. AbstrakHybridization program has been used to increase fish production for more than three decades. Concern to this program is due to the problem of potential impact on wild population. Hence, it is urgently needed to provide quick identification tools in the field and as well as commercial aspect in term of growth rate. This study investigated biometric characters, growth performance, and ovarian development of Pangasius djambal and Pangasianodon hypophthalmus and their reciprocal hybrids. A detailed morphological analysis was done on the hybrids of P. djambal and P. hypophthalmus. Earthen pond on the growth comparison as well as the ovarian development was also observed. The results of morphometric and meristic showed that the reciprocal hybrids have intermediate characters except for gill rakers numbers in which lower than that of parental species. Growth analysis showed that hybrids has better performance compare to the parental one, while ovarian development of hybrids was developed abnormal. No oocytes reached vitellogenesis and showed major atresia and fatty. It can be concluded that hybrids of P. djambal and P. hypophthalmus is true hybrids. The hybrids can be used as final seed for aquaculture production due to clearly identify from parents, superior growth performance and steril.

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Molecular confirmation of the large-scale loach Paramisgurnus dabryanus Dabry de Thiersant, 1872 (Cypriniformes, Cobitidae) in Europe

BioInvasions Records ◽

10.3391/bir.2019.8.2.24 ◽

2019 ◽

Vol 8 (2) ◽

pp. 419-426

Author(s):

Bernhard Stoeckle

Keyword(s):

Large Scale ◽

Paramisgurnus Dabryanus

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Short visits reveal consistent patterns of interyear and intercolony variation in seabird nestling diet and performance

Canadian Journal of Zoology ◽

10.1139/z02-211 ◽

2002 ◽

Vol 80 (12) ◽

pp. 2190-2199 ◽

Cited By ~ 15

Author(s):

D F Bertram ◽

T Golumbia ◽

G K Davoren ◽

A Harfenist ◽

J Brown

Keyword(s):

Growth Performance ◽

Large Scale ◽

Southern Oscillation ◽

Large Contribution ◽

Fish Prey ◽

Study Region ◽

Entire Study ◽

Nestling Growth ◽

Nestling Development ◽

Nestling Diet

To investigate the utility of short visits to seabird colonies to gauge nestling growth performance and diet, in 4 consecutive years (19951998) we measured nestling development and diet of Rhinoceros Auklets (Cerorhinca monocerata) at three colonies in British Columbia: Seabird Rocks, Triangle Island, and SGaang Gwaii (Anthony Island). In all years, nestlings of a given wing length on Triangle Island were significantly smaller than those on Seabird Rocks or SGaang Gwaii. Meals were also significantly lighter on Triangle Island than on Seabird Rocks or SGaang Gwaii; meals on the latter two islands were indistinguishable in mass. Retarded nestling development and small meal size on Triangle Island likely reflect the large contribution of rockfish (Sebastes spp.) to nestling diet on that colony alone. The intercolony differences in nestling performance appear to reflect the strong influence of local fish prey populations. Nonetheless, a united decline in performance in 1996 and subsequent increase on all colonies suggest the influence of large-scale ocean climate phenomena on our entire study region and beyond. We did not, however, observe noticeable effects of the 19971998 El Niño Southern Oscillation event on nestling growth performance or diet. We discuss the utility of our short-visit techniques for seabird-monitoring programs.

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