ISSN: 1812-237X

Volume 3, Issue 2

Volume 3, Issue 2, Autumn 2006, Page 75-142


POST- NAUPLIAR STAGES OF"ACARTIA (ACARTIELLA) FAOENSIS" , KHALAF (COPEPODA : CALANOIDA ), FROM KHOR AL-ZUBAIR SOUTH OF IRAQ

TALIB A. KHALAF

Iraqi Journal of Aquaculture, Volume 3, Issue 2, Pages 75-83

Acartia (Acartiella ) faoensis has been established by the author,(Khalaf, 1991) from Khor Al-Zubair and Khor Abdulla NW Arabian Gulf. It passes through six copepodite stages identical with most other copepods; the last stage is the adult. Description, illustration and measurements for every stage are presented.

SOME NOTES ON MELANOPSIDAE (GASTROPODA) OF MESOPOTAMIA

M. D. Naser

Iraqi Journal of Aquaculture, Volume 3, Issue 2, Pages 85-90

An investigation to clarify some obscurity about Melanopsidae was performed on specimens collected from different sites of the South of Iraq. Three different morphs were recognized, two are widespread: Melanopsis costata and Melanopsis nodosa, the other Melanopsis subtingitana has a narrow distributions. Key words: Melanopsidae; Melanopsis costata; Melanopsis nodosa; Melanopsis subtingitana; South of Iraq

AKINETES FORMATION AND GERMINATION IN CYLINDROSPERMUM MAJUS KUTZ

ABDUL-LATEEF M. JAWAD

Iraqi Journal of Aquaculture, Volume 3, Issue 2, Pages 91-97

The isolation and purification of Cylindrospermum majus Kutz. Were made from different water and soil samples. Akinetes formation was observed during the incubation of samples (cultures) at 4ºC for six months period. Germination of akinetes took place only after transferring the isolate to a new culture media at 26ºC. The gradual steps of akinetes germination were followed and illustrated for the first time in this species. The results showed that the outer most layer may expand to the available references do reffer to such calyptra formation and such growth and development.

PHYTOPLANKTON COMPOSITION OF SAWA LAKE, IRAQ.

Fikrat M. Hassan; HUSSAIN A. AL-SAADI; Foad M. Alkam

Iraqi Journal of Aquaculture, Volume 3, Issue 2, Pages 99-107

The phytoplankton composition of Sawa Lake was studied monthly for 18 months, from October 1999 to March 2001. A phytoplankton net (20 µ) was used to collect phytoplankton samples. A total of 51 algal taxa was identified belong to diatoms (Bacillariophyceae), blue greens (Cyanophyceae), green algae (Chlorophyceae) and euglenoids (Euglenophyceae). Diatoms were dominated in species number (64.7%) and total cell number (68.6%) followed by blue greens (23.5%) and (15.5%), and the green (7.8%) and (14.5%) respectively. Bimodal seasonal peaks of chlorophyll-a and phytoplankton population were observed in the lake.

EVALUATION OF USEING SOME AQUATIC ALGAE AND PLANT MATERIALS IN COMMON CARP ( CYPRINUS CARPIO) LARVAES DIETS

U. H. Yousif; L. M. Abdulkarrem; Kadhum H. Younis

Iraqi Journal of Aquaculture, Volume 3, Issue 2, Pages 123-134

Filamentous algae , Blue green algae and Alpha alpha were used in common carp ( Cyprinus carpio ) larvaes diets at different percentages (10 , 24 , 34)% from diet weight to Alpha alpha and (34) % to filamentous algae and blue green algae .The larvaes were cultured in average weight (0.00089)g and average length (0.7)cm on six aquaria at (63) larvae/aquarium . The higher growth rates , survival rates and the increase of larvae weight and length were found in the diets (5) and (6) (34%) filamentous algae and blue green algae respectively in comparable to diet (1) , the length rates was (1.4,1.33)cm and the weight rates was (0.035, 0.036)g and the survival rates (77.7, 71.4)% and the specific growth rates (3832.58 , 3944.94) % and the relative growth rates (17.48 , 17.61)%wt/day respectively compared to (10.1)cm length rate , (0.016)g weight rate , (54)% survival rate , (1697.75)% specific rate and (13.75) %wt/day relative growth rate to diet (1) . There are a significant differences (P < 0.05) between the diets (5 , 6) and the other diets in larvaes length , weight , growth rates and survival rates .

EVALUATION OF OKRA AND SEBESTAN FRUITS AS A BINDERS IN THE DIETS OF BUNNI (BARBUS SHARPEYI)

A. A.J. Mahdi; Adil Y. Al-Doubaikul; J. M. Esaha; S. Murtada A

Iraqi Journal of Aquaculture, Volume 3, Issue 2, Pages 135-142

Okra (Abelmoschus esculentus) and Sebestan (Cordia myxa) fruits were used as plant binders in the diets of Bunni (Barbus sharpeyi) . These binders were beside a control diet without binder., compared with the starch as a traditional binders.All binders included in the diets by 2% were with two replicates for each treatments. Feeding rate was 4% of fish weight for 70 days. The physical properties of diets showed that the control diet has the highest density while the diet containing starch has the lowest followed by Okra and Sebestan. Bouncy was 25 Sec. while 34 min. needed for dissolving for Okra diet compared to one sec. and two min. for control respectively The later diet showed 60 % for splitting .The chemical composition of diets was not affected by adding the binders as well as palatability of diets as high values were recorded in weight increments , relative and specific growth rates in experimented diets .Moreover the chemical composition of fish was not affected after feeding compared to those before it. The present study revalid the possibility of using some plant materials especially Okra as fish diets binder.