Abalone safe to eat
Abalone safe to eat

Abalone safe to eat

Jana-Mari Smith
Shellfish aficionados are free to enjoy abalone from the Lüderitz Aquaculture Production area again after an almost two-week ban was lifted yesterday.

The fisheries and marine resources ministry yesterday announced that it is safe to consume abalone again after the most recent test results for paralytic shellfish poison (PSP) came back negative.

The tests were facilitated by the Namibia Standards Institute (NSI) and were guided by the National Shellfish Sanitation Programme.

Two consecutive re-tests produced negative results, the ministry said.

On 11 January, the ministry warned the public not to eat abalone from the Lüderitz area after a harmful algal bloom event was detected. The presence of biotoxin-producing algae was confirmed during routine testing by the NSI.

Paralytic shellfish poison is a naturally occurring toxin which can concentrate in shellfish and, when eaten, can cause illness in humans.

This biotoxin affects the nervous system and paralyses muscles, thus the term paralytic shellfish poison. High levels of PSP can cause severe illness and even death. It's normal for biotoxin-producing algae to be present in seawater but they are usually at very low concentrations and pose no problems.

When the algae bloom, the concentration increases dramatically. The increased algae become a greater food source for shellfish and the more algae the shellfish eat, the more biotoxin they accumulate.

Biotoxins don't harm shellfish, so the level in their tissue continues to climb until the bloom subsides. When the number of toxin-producing algal cells returns to normal low levels, the shellfish eventually flush the toxin from their systems.

It can be several days to several months or longer before they're safe to eat again.

Last week, Namibian Sun reported that the fisheries ministry had also given the green light to the public to eat oysters from Walvis Bay Aquaculture Production Area 1, although mussels from the same area are still considered unsafe.

A public warning was issued after oyster and mussel samples from the production area tested positive for diarrhetic shellfish poisoning (DSP), making them unsafe for consumption.

JANA-MARI SMITH

Comments

Namibian Sun 2024-03-29

No comments have been left on this article

Please login to leave a comment

Katima Mulilo: 19° | 36° Rundu: 19° | 29° Eenhana: 19° | 29° Oshakati: 21° | 30° Ruacana: 20° | 33° Tsumeb: 19° | 29° Otjiwarongo: 16° | 29° Omaruru: 19° | 32° Windhoek: 17° | 29° Gobabis: 17° | 30° Henties Bay: 16° | 20° Wind speed: 22km/h, Wind direction: S, Low tide: 11:22, High tide: 05:24, Low Tide: 23:26, High tide: 17:46 Swakopmund: 16° | 17° Wind speed: 24km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:22, Low Tide: 23:24, High tide: 17:44 Walvis Bay: 16° | 22° Wind speed: 27km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:21, Low Tide: 23:24, High tide: 17:43 Rehoboth: 19° | 30° Mariental: 23° | 34° Keetmanshoop: 24° | 35° Aranos: 22° | 33° Lüderitz: 15° | 28° Ariamsvlei: 24° | 35° Oranjemund: 14° | 25° Luanda: 27° | 28° Gaborone: 20° | 32° Lubumbashi: 17° | 26° Mbabane: 16° | 21° Maseru: 11° | 29° Antananarivo: 16° | 27° Lilongwe: 17° | 27° Maputo: 20° | 28° Windhoek: 17° | 29° Cape Town: 17° | 28° Durban: 20° | 24° Johannesburg: 16° | 24° Dar es Salaam: 26° | 32° Lusaka: 20° | 30° Harare: 16° | 29° Currency: GBP to NAD 23.8 | EUR to NAD 20.37 | CNY to NAD 2.61 | USD to NAD 18.88 | DZD to NAD 0.14 | AOA to NAD 0.02 | BWP to NAD 1.33 | EGP to NAD 0.39 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.74 | ZWL to NAD 0.04 | BRL to NAD 3.77 | RUB to NAD 0.2 | INR to NAD 0.23 | USD to DZD 133.85 | USD to AOA 832.63 | USD to BWP 13.71 | USD to EGP 47.35 | USD to KES 130.98 | USD to NGN 1303.34 | USD to ZAR 18.87 | USD to ZMW 25.01 | USD to ZWL 321 | Stock Exchange: JSE All Share Index 74536 Up +0.85% | Namibian Stock Exchange (NSX) Overall Index 1528.69 Up +0.84% | Casablanca Stock Exchange (CSE) MASI 12986.94 Up +0.04% | Egyptian Exchange (EGX) 30 Index 27559.35 Down -2.36% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - Nam 2.22 SAME | Oryx Properties Ltd 12.1 UP 1.70% | Paratus Namibia Holdings 11.99 SAME | SBN Holdings 8.45 SAME | Trustco Group Holdings Ltd 0.48 SAME | B2Gold Corporation 47.34 DOWN 1.50% | Local Index closed 677.62 UP 0.12% | Overall Index closed 1534.6 DOWN 0.05% | Osino Resources Corp 19.47 DOWN 2.41% | Commodities: Gold US$ 2 233.12/OZ UP +1.93% | Copper US$ 3.99/lb UP +0.12% | Zinc US$ 2 455.50/T UP 0% | Brent Crude Oil US$ 87.65/BBP UP +1.46% | Platinum US$ 908.62/OZ UP +1.53% Sport results: Weather: Katima Mulilo: 19° | 36° Rundu: 19° | 29° Eenhana: 19° | 29° Oshakati: 21° | 30° Ruacana: 20° | 33° Tsumeb: 19° | 29° Otjiwarongo: 16° | 29° Omaruru: 19° | 32° Windhoek: 17° | 29° Gobabis: 17° | 30° Henties Bay: 16° | 20° Wind speed: 22km/h, Wind direction: S, Low tide: 11:22, High tide: 05:24, Low Tide: 23:26, High tide: 17:46 Swakopmund: 16° | 17° Wind speed: 24km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:22, Low Tide: 23:24, High tide: 17:44 Walvis Bay: 16° | 22° Wind speed: 27km/h, Wind direction: SW, Low tide: 11:20, High tide: 05:21, Low Tide: 23:24, High tide: 17:43 Rehoboth: 19° | 30° Mariental: 23° | 34° Keetmanshoop: 24° | 35° Aranos: 22° | 33° Lüderitz: 15° | 28° Ariamsvlei: 24° | 35° Oranjemund: 14° | 25° Luanda: 27° | 28° Gaborone: 20° | 32° Lubumbashi: 17° | 26° Mbabane: 16° | 21° Maseru: 11° | 29° Antananarivo: 16° | 27° Lilongwe: 17° | 27° Maputo: 20° | 28° Windhoek: 17° | 29° Cape Town: 17° | 28° Durban: 20° | 24° Johannesburg: 16° | 24° Dar es Salaam: 26° | 32° Lusaka: 20° | 30° Harare: 16° | 29° Economic Indicators: Currency: GBP to NAD 23.8 | EUR to NAD 20.37 | CNY to NAD 2.61 | USD to NAD 18.88 | DZD to NAD 0.14 | AOA to NAD 0.02 | BWP to NAD 1.33 | EGP to NAD 0.39 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.74 | ZWL to NAD 0.04 | BRL to NAD 3.77 | RUB to NAD 0.2 | INR to NAD 0.23 | USD to DZD 133.85 | USD to AOA 832.63 | USD to BWP 13.71 | USD to EGP 47.35 | USD to KES 130.98 | USD to NGN 1303.34 | USD to ZAR 18.87 | USD to ZMW 25.01 | USD to ZWL 321 | Stock Exchange: JSE All Share Index 74536 Up +0.85% | Namibian Stock Exchange (NSX) Overall Index 1528.69 Up +0.84% | Casablanca Stock Exchange (CSE) MASI 12986.94 Up +0.04% | Egyptian Exchange (EGX) 30 Index 27559.35 Down -2.36% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - Nam 2.22 SAME | Oryx Properties Ltd 12.1 UP 1.70% | Paratus Namibia Holdings 11.99 SAME | SBN Holdings 8.45 SAME | Trustco Group Holdings Ltd 0.48 SAME | B2Gold Corporation 47.34 DOWN 1.50% | Local Index closed 677.62 UP 0.12% | Overall Index closed 1534.6 DOWN 0.05% | Osino Resources Corp 19.47 DOWN 2.41% | Commodities: Gold US$ 2 233.12/OZ UP +1.93% | Copper US$ 3.99/lb UP +0.12% | Zinc US$ 2 455.50/T UP 0% | Brent Crude Oil US$ 87.65/BBP UP +1.46% | Platinum US$ 908.62/OZ UP +1.53%