Growth and survival performance of the West African mangrove oyster, Crassostrea tulipa cultivated by suspension and bottom culture methods in the Densu Estuary, Ghana

Abstract This study compares the efficacy of suspension and bottom culture methods of the West African mangrove oyster, Crassostrea tulipa, on recycled oyster shell cultches in connection with some environmental factors in the Densu Estuary, Ghana, from December 2017 to July 2018. Oyster spat grew up to 5.56 ± 0.10 cm SH for suspension and 4.60 ± 0.14 cm SH for bottom culture on the convex surfaces of oyster shell cultches, whereas oysters cultured on the concave surfaces by suspension and bottom cultured measured 5.59 ± 0.14 cm SH and 4.68 ± 0.14 cm SH, respectively. There was a significant difference (F = 36.26, p = 0.001) between the growth rate of oysters cultured on convex surfaces of cultches by suspension (0.80 ± 0.23 cm/month) and bottom culture (1.02 ± 0.24 cm/month). The growth rate of cultured oysters on concave surfaces of cultches by suspension (1.00 ± 0.24 cm/month) was significantly better (F = 22.32, p < 0.001) than the bottom approach (0.81 ± 0.23 cm/month). Before the extermination of oysters cultured on the bottom in July 2018, there was no significant difference in the survival of oysters cultured by suspension and bottom methods on the convex (χ2 = 0.06, p = 0.99) and concave surfaces (χ2 = 0.19, p = 0.99). Of the physico-chemical factors monitored, oyster growth and survival were significantly influenced by DO (p = 0.004; 0.039) and salinity (p = 0.027; 0.012), respectively. Suspension culture approach should be preferred over the bottom culture, especially for water bodies with low bulk density.

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THE EFFECTS OF FEED ON THE INTAKE, DIGESTIBILITY AND GROWTH RATE OF WEST AFRICAN DWARF GOATS FED GLIRICIDIA sepium AND LEUCAENA LEUCOCOEPHALA

Nigerian Journal of Animal Production ◽

10.51791/njap.v22i2.2437 ◽

2021 ◽

Vol 22 (2) ◽

pp. 164-168

Author(s):

S. M. Odeyinka ◽

A. A. Ademosun

Keyword(s):

Growth Rate ◽

Dry Matter ◽

Gliricidia Sepium ◽

West African ◽

Dry Matter Intake ◽

West African Dwarf ◽

West African Dwarf Goats ◽

Significant Difference ◽

Different Levels ◽

Dwarf Goats

The study evaluated the effects of level of feed offer on dry matter intake (DMI) , digestibility, the parts of plants selected and on the growth rate of West African dwarf (WAD) goats without resulting in toxicity. Seven different levels of feed offer ranging from 40g/kg0.75/day to 130Wkg0.75/day in increments of 15g/kg0.75) were fed to two groups of goats. The first group was fed 100% Gliricidia while the while the second was fed 50% Gliricidia and 50% Leucaena diet (50/50). The level of feed offer had significant effect on the DIM and digestible DMI (DDMI) of the goat (P < 0.01). The Leucaena intake in a 50/50 diet was always higher than the Gliricidia intake except at 55g1kg0.75 offer level. The level of feed offer had significant effects on the parts of plants selected (P < 0.01.) and on the growth rate. The leaf intake was statistically higher than the stem intake (P < 0.01). All the goats on 40g/kg0.75 and 55g/kg0.75 on a 100% Gliricidia diet lost weight while only those on 40g/kg0.75 lost weight on a 50/50 diet. There was no significant difference in the growth rate of goats on feed offer levels of 70g to 130g/kg0.75 (P > 0.05). The study indicate that goats performance was higher on a mixed browse diet than on Gliricidia alone. Goats performed best at 100g/kg0.75 offer level.

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Reproductive performance of the West African Dwarf and the Nungua Black Head sheep of Ghana

Animal Science ◽

10.1017/s0003356100031615 ◽

1981 ◽

Vol 33 (3) ◽

pp. 249-252 ◽

Cited By ~ 5

Author(s):

L. O. Ngere ◽

G. Aboagye

Keyword(s):

Survival Rates ◽

West African ◽

The West ◽

West African Dwarf ◽

Significant Difference ◽

Black Head ◽

The Mean ◽

Dwarf Type ◽

West African Dwarf Sheep ◽

Dwarf Sheep

ABSTRACTA study was made of some aspects of reproduction in the Nungua Black Head and the Ghanian variety of the West African Dwarf sheep. The gestation period of the two breeds was similar: 150 and 148 days respectively. Ewes mated in August and September tended to have slightly longer gestation periods than those mated in March. The mean birth weights were 2·2 kg in the Nungua Black Head and 13 kg in the West African Dwarf. Type of birth affected the weight of lambs at birth. The Nungua Black Head had no triplets, 0·132 twins and 0·868 singles. The West African Dwarf was more prolific: 0·402 singles, 0·557 twins and 0·041 triplets. The weight advantage of the Nungua Black Head lambs at birth was maintained to weaning and they also had better survival rates. The adjusted 12-week weaning weights averaged 9·8 and 5·8 kg respectively for the Nungua Black Head and West African Dwarf. What the West African Dwarf lost in individual weight it appeared to make up in numbers so that, when the breeds were compared in terms of kg of lamb weaned per ewe mated, there was no significant difference between them.

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Culture Pond Influences the Growth and Survival of Clarias gariepinus Fingerlings reared in Poly and Monoculture

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2021/v14i430302 ◽

2021 ◽

pp. 22-28

Author(s):

L. U. Onyia ◽

I. J. Ochokwu ◽

I. J. Bargudu

Keyword(s):

Growth Rate ◽

Growth Parameters ◽

Block Design ◽

Clarias Gariepinus ◽

Stocking Density ◽

Physical Space ◽

Single Species ◽

Growth And Survival ◽

Significant Difference ◽

Earthen Ponds

Monoculture is the rearing of single species of fish in a pond while polyculture is the farming of two or more species in the same physical space. This study aims to compare the growth parameters of Clarias gariepinus fingerlings in monoculture and polyculture, using concrete and earthen ponds in a randomized complete block design. The polyculture, comprised of Clarias gariepinus and Oreochromis niloticus. 480 fingerlings were used; the stocking density was 40fish in a 3x2x1.5m depth with initial weight (4.84±0.11547) for C. gariepinus in monoculture and 40 each in polyculture with an initial pooled weight of O. niloticus (50g) replicated thrice, it was fed for eight weeks with commercial feed (40% crude protein). Weekly, random sampling was done to measure the growth and adjust the feeding rate. The results revealed that polyculture has the best mean final weight (160.07±0.18559g) and weight gain of 155.29, while the highest total length (45.666±3.179) was recorded in monoculture for Clarias gariepinus reared in an earthen pond. The polyculture had the highest specific growth rate (2.46), Relative growth rate (246.49), and condition factor (0.184). There was a significant difference (P<0.05) in monoculture of both concrete and earthen ponds.

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A preliminary report on the production characters of three types of cattle in Ghana.

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v11i5.17536 ◽

1963 ◽

Vol 11 (5) ◽

pp. 364-377

Author(s):

G. Montsma

Keyword(s):

Growth Rate ◽

Body Weight ◽

Agricultural Research ◽

West African ◽

Research Station ◽

Insufficient Data ◽

The West ◽

Weight Growth ◽

Before And After ◽

The University

At the University of Ghana's Agricultural Research Station at Nungua observations were begun in 1957 on the performance of West African Shorthorn, N'Dama and Sokoto Gudali cattle. The main preliminary findings are discussed under the following headings: body weight, growth rate, milk yield, reproductive efficiency, and dentition and age. In spite of the fact that the N'Dama and West African Shorthorn are naturally small animals, body weight and growth rate could be substantially increased by better feeding. Insufficient data are as yet available on the Sokoto. Under the better-than-average feeding conditions at the station, av. body weight at 8 mths. was 305 lb. in the N'Dama, 340 lb. in the West African Shorthorn, and 470 lb. in the Sokoto. Maximum body weight at 8 mths. was 340, 360 and 550 lb. resp. In animals fed a concentrate supplement, av. 252-day milk yields per 100 lb. body weight were 295, 300 and 335 lb. for the N'Dama, West African Shorthorn and Sokoto resp. max. yields, expressed in a similar manner, being 416, 430 and 458 lb. resp. Milk yields were estimated by weighing the calves before and after suckling thrice daily for approx. 20 mins The av. calving percentages for the 3 breeds were 85, 83 and 76 resp. which are equivalent to calving intervals of 14-2, 14.5 and 15.8 mths. The av. age at 1st calving in the West African Shorthorn was estimated to be 3 yrs. (2.3-3.8). Insufficient data were available on the other 2 breeds. It is considered that, if adequately fed, heifers are capable of calving at 27-30 mths. of age. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Pertumbuhan dan Sintasan Juvenil Teripang Pasir Holothuria scabra pada Pemeliharaan Dengan dan Tanpa Rumput Laut Gracilaria sp., Menggunakan Keramba Apung dan Tancap di Tambak

Oseanologi dan Limnologi di Indonesia ◽

10.14203/oldi.2020.v5i3.340 ◽

2020 ◽

Vol 5 (3) ◽

pp. 199

Author(s):

Dedy Kurnianto ◽

Lisa Fajar Indriana ◽

Abdul Wahab ◽

Syafriyadi Hafid ◽

Balkam Fadlan Badi

Keyword(s):

Water Quality ◽

Growth Rate ◽

Quality Parameters ◽

Raw Material ◽

Growth And Survival ◽

Randomized Design ◽

Significant Difference ◽

In The Wild ◽

Completely Randomized Design ◽

Increment Growth

Growth and Survival of Sandfish Holothuriascabra Juveniles Grown with and without Seaweed Gracilaria sp., using Floating and Fixed Hapas in Earthen Pond. Holothuriascabra known as sandfish have long been used for pharmaceutical, cosmetic, and food industries.Juveniles production is one of the ways to address the problem of raw material availability due to declining sandfish population in the wild. This research aimed to determine growth performance and survival of sandfish juveniles reared with and without seaweed Gracilaria sp. using floating and fixed hapas in earthen pond. The research was conducted from May to September 2014. A completely randomized design was used to arrange 12 hapas of four treatments groups with three replicates including floating hapas without Gracilaria sp. (ATR), floating hapas with Gracilariasp. (ADR), fixed hapas without Gracilaria sp. (TTR) and fixed hapas with Gracilaria sp. (TDR). Some parameters was observed includingweight increment, Growth Rate (GR),Specific Growth Rate(SGR), Biomass, Survival, and Water Quality. The result showed that GR and SGR were not significantlydifferent among treatments (P>0.05). Survial and Biomass showed significant difference among treatments (P <0.05). ATR has the highest GR, SGR, survival, dan biomass whereas TDR has the lowest GR, SGR, survival, dan biomass. Water quality parameters were in optimal range for sandfish rearing. AddedGracilaria sp.tend to inhibitGR, SGR, survival, dan biomass.

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HELMINTH PARASITES OF GOATS AND SHEEP AT SLAUGHTER HOUSE IN LAFIA, NASARAWA STATE, NIGERIA

FUDMA Journal of Sciences ◽

10.33003/fjs-2020-0402-154 ◽

2020 ◽

Vol 4 (2) ◽

pp. 34-40

Author(s):

A. A. Aliyu ◽

J. I. Maikenti ◽

O. P. Aimankhu ◽

S. O. Ayuba ◽

H. O. Ahmed ◽

...

Keyword(s):

Developing Countries ◽

West African ◽

Helminth Parasites ◽

The West ◽

West African Dwarf Goats ◽

Slaughter House ◽

Significant Difference ◽

High Prevalence ◽

Sheep Production ◽

Dwarf Goats

Helminth parasites have been recognized as one of the major constraints to both goat and sheep production in Nigeria and other developing countries. A study aimed to determine helminth parasites of goats and sheep at slaughter in Lafia from June to July 2019. Two hundred fecal samples were collected and analyzed from 100 goats and 100 sheep using the direct smear method. The fecal sample examined revealed an overall prevalence of 155(77.5%), with goat having 80(80.0%), sheep 75(75.0%). Thirteen helminth parasites were found with nematode the most prevalent 103(66.5%), trematode had 35(22.6%), and cestode the least with 17(10.1%) and there was a statistically significant difference among the parasites (P<0.001). According to sex, females 59(43.7%) were more infected than males 25(38.5%) and there was a statistically significant difference (P<0.001). Age of sampled animals (Goat and Sheep) shows that <1 year had 28(18.1%), younger animals within the ages of <2 years 65(41.9%) were more infected with helminth parasites than adult animals from <3 years (13.5%) and >33 had 25(16.1%) and there was no statistically significant difference in age (P>0.312). According to breeds, the West African dwarf goats and sheep were more infected 104(52%), the Fulani breeds 73(36.5%) and the least was Balami sheep with 13(6.5%), Uda goat 10(5%) and there was a statistically significant difference among the breeds (P<0.001). This study revealed a high prevalence of helminth parasites of goat and sheep at slaughter in Lafia which may reduce productivity. It is recommended that goats and sheep be dewormed regularly.

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Ex-situ Morphological and Morphometric Studies of the Testis In the West African Dwarf Buck GoatEx-situ Morphological and Morphometric Studies of the Testis In the West African Dwarf Buck Goat

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v3i11..516 ◽

2015 ◽

Vol 3 (11) ◽

Author(s):

Lukman Oladimeji Raji ◽

Oluwatoyin Oluwasola Ajala

Keyword(s):

West African ◽

Ex Situ ◽

Displacement Method ◽

Water Displacement ◽

The West ◽

Luminal Diameter ◽

West African Dwarf ◽

Prolate Ellipsoid ◽

Significant Difference ◽

The Right

This study was carried out to document ex-situ morphological and morphometric characteristics of the testis in the West African Dwarf (WAD) buck goat. For this aim, 24 post pubertal WAD buck testes were collected at the Ipata Abattoir in Ilorin, Kwara state, Nigeria. Gross morphologic results revealed that WAD testis was ellipsoidal in shape with 2 borders (free and attached), margins (medial and lateral) and similar surfaces (ventral and dorsal). The surfaces were covered by an outer tunica vaginalis and a deep tunica albuginea. Histomorphology showed the testis comprised mostly of rounded and some irregularly shaped seminiferous tubules (ST). Each ST was lined by a basement membrane and a layer of germinal epithelium with lumen filled with spermatozoa surrounded by an adluminal space. Gross morphometric results showed that there were no significant differences in the weight, length, width and height of the right and left testis. Also in the volumes of testes obtained by water displacement method and using the prolate ellipsoid formula. There was a strong correlation between the weights and volumes of testes obtained using these methods. There were significant differences between the volumes of testes obtained by using the prolate spheroid and Lambert formulae, when compared with those obtained by water displacement method respectively. But there was no significant difference in testicular volume obtained by the prolate ellipsoid formula and the water displacement method. Histomorphometric results revealed no significant differences in the seminiferous tubular diameter, seminiferous luminal diameter and germinal epithelia height of the right and left testes respectively. The morphological and morphometric data highlighted in this study would be useful in comparative regional anatomy and researches on the testis of these valuable breed of goats.

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Enhancement of growth performance and hematological changes in rainbow trout (Onchorhynchus mykiss) alevins fed with Bifidobacterium bacteria

Journal of Fisheries ◽

10.17017/jfish.v5i1.2017.152 ◽

2017 ◽

Vol 5 (1) ◽

Author(s):

Javad Sahandi ◽

Hojatollah Jafaryan ◽

Mehdi Soltani ◽

Pouneh Ebrahimi

Keyword(s):

Growth Rate ◽

Rainbow Trout ◽

Growth Performance ◽

Feed Conversion ◽

Growth And Survival ◽

Commercial Diet ◽

Positive Effects ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Significant Difference ◽

Hematological Changes

The study of probiotic application as an important rearing strategy was started more than 30 years ago and most of these studies were carried out to increase growth and survival of larvae. Effect of Bifidobacterium animalis PTTC-1631 and B. lactis PTTC-1736 as probiotic supplement has been studied on growth performance and hematological changes on rainbow trout, Oncorhynchus mykiss alevins with initial body weight of 0.583 ± 0.197 g. The commercial diet was supplemented with graded levels of probiotics (1×107, 2×107 and 3×107 CFU g-1 dry feed) to obtain 3 sets of experimental diets (T1, T2, andT3 respectively) and fed four times a day for 60 days. T1 alevin showed the best growth performance in terms of specific growth rate, weight gain, metabolic growth rate, feed conversion ratio and survival rate. The highest red and white blood cell concentrations were noticed in fish fed T2 and T3 diets, respectively, no significant difference was observed in hemoglobin content. T1 showed the significant elevation of serum biochemical parameters and reduction of cortisol level. The results of present study might suggest likely positive effects of probiotic supplements with concentration of 1×107 CFU g-1 dry feed on growth and hematology on rainbow trout alevins.

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Growth and survival of the hatchery larvae of pacific oyster Crassostrea gigas under different concentrations of microalgae and salinity in conditions of southern Primorye

Izvestiya TINRO ◽

10.26428/1606-9919-2021-201-723-734 ◽

2021 ◽

Vol 201 (3) ◽

pp. 723-734

Author(s):

A. S. Tabelskaya ◽

M. V. Kalinina

Keyword(s):

Growth Rate ◽

Crassostrea Gigas ◽

Pacific Oyster ◽

Survival Rates ◽

Peter The Great Bay ◽

Japan Sea ◽

Southern Primorye ◽

Chaetoceros Muelleri ◽

Growth And Survival ◽

Significant Difference

Growth and survival rates for larvae of pacific oyster Crassostrea gigas (Thunberg, 1793) hatched in artificial conditions are estimated for the stages of development from D-veliger to pediveliger. The experiment was conducted in the Mariculture Center located on Popov Island (Peter the Great Bay, Japan Sea) for 2 regimes of feeding and water salinity of 26 and 32 ppt. Microalgae Isochrysis galbana, Chaetoceros muelleri and Phaeodactylum tricornutum cultivated in the Mariculture Center were used as a feed in both regimes, in different concentrations. The maximum concentration was 4-fold higher than the minimum one: daily doses of food were 20 and 5 thousand cells/mL for veligers, 40 and 10 thousand cells/mL for early veliconkhes, and 80 and 20 thousand cells/mL for late veliconkhes, respectively, whereas 80 thousand cells/mL for all larvae in transition to pediveliger stage. Statistically significant difference of the growth rate was found for cases with different food concentration (p < 0.05). The larvae with better feeding had higher growth rate under salinity of both 26 and 32 ppt. Besides, the lowered salinity (26 ppt) had some positive effect for growth in the regime of better feeding. Survival rate of the larvae from D-veliger to pediveliger was high under all regimes of the experiment and was estimated for the minimal diet as 77.4 and 64.7 % under salinity of 26 and 32 ppt, respectively, and for the maximum diet as 81.2 and 80.7 % under salinity of 26 and 32 ppt, respectively. According to the experiment results, deficit of food at early stages of the oyster larval development affects negatively on their growth but does not have significant impact on their survival.

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